Heraclitus, a Greek philosopher (544 B.C.), is famous for saying that “no man ever steps in the same river twice, for it’s not the same river and he’s not the same man.” It is a good quote to use as we think about the next attempt to revive the Iran nuclear deal, more formally known as the JCPOA (The Joint Comprehensive Plan of Action).
No man ever steps in the same river twice, and no country can sign the same agreement twice. Why? For it’s not the same situation, and it’s not the same country. I am not the only one citing this wisdom; the head of the U.N. atomic watchdog (IAEA) effectively said the same when he stated, “I cannot imagine that they are going simply to say, ‘We are back to square one’ because square one is no longer there.” The river is not the same river, and as President-elect Biden takes office and prepares to renegotiate with Iran, reentering the Obama-era agreement will not be available to him.
We are reminded of this aphorism because even though the year just started (President Trump is still trying to keep his job and President-elect Biden is still polishing his inaugural speech), Iran is already sending signals — lest anyone forget that it is there, waiting, and has expectations. Iran announced that it began enriching uranium to levels unseen since it signed the nuclear deal. The deal had capped the fissile purity to which Iran can refine uranium at 3.67%. Iran breached that cap in 2019, and its enrichment level remained steady at up to 4.5% since then. It is now moving to restore its 20% level enrichment.
What are these? These are signals.
Trump is no longer a threat. Negotiations with Biden are on the horizon. The Iranians must play as many cards as they have when they renegotiate a deal. If they enrich uranium to a higher level, giving up on enrichment is something they can trade for something else. If negotiations become difficult, they can up the ante and move from 20% enrichment to an even higher level.
The pressure is on the other side, namely, Biden. After the new president is inaugurated, he will have only a narrow window of time to reignite a process of negotiations. In March, Iran begins its new year and has a long holiday. When the holiday is over, the Iranian presidential campaign begins. So, from January to June, there is very little time to talk.
The pressure is on the other side, namely, Biden.
The United States wants Iran “to roll back its recent breaches, especially on uranium enrichment.” Iran wants U.S. sanctions lifted. Parties also need to consider Europe, not always unified, and China, whose reaction to Iran’s recent breach was: “China urges all sides to exercise calm and restraint, to stick to the commitments of the agreement and to refrain from taking actions that might escalate tensions, so as to make space for diplomatic efforts and a change in the situation.” There’s Israel, supported by the Saudis, Egypt and other Gulf states, who want any deal — the new deal because you can’t step into the same river twice — to correct some of the many flaws of the previous deal.
One question for Biden is this: Does he see the flaws? Would he be willing to acknowledge — not publicly for people to gloat but rather as a policy directive — that the previous agreement was flawed? The agreement was signed when he was the vice president, so admitting errors would be complicated for him and possibly embarrassing. Luckily, it has been a long time since the agreement was finalized, and Biden can also use Heraclitus to tell the Iranians that what they want is no longer available, neither for him nor for them.
True, Persians and Greeks did not always see the world in the same way. But Heraclitus is special. He lived in the city of Ephesus when it was part of the Persian Empire. At least some origins of his philosophy can be traced to Persian sources.
Iranian Games 2021: the First Act
Shmuel Rosner
Heraclitus, a Greek philosopher (544 B.C.), is famous for saying that “no man ever steps in the same river twice, for it’s not the same river and he’s not the same man.” It is a good quote to use as we think about the next attempt to revive the Iran nuclear deal, more formally known as the JCPOA (The Joint Comprehensive Plan of Action).
No man ever steps in the same river twice, and no country can sign the same agreement twice. Why? For it’s not the same situation, and it’s not the same country. I am not the only one citing this wisdom; the head of the U.N. atomic watchdog (IAEA) effectively said the same when he stated, “I cannot imagine that they are going simply to say, ‘We are back to square one’ because square one is no longer there.” The river is not the same river, and as President-elect Biden takes office and prepares to renegotiate with Iran, reentering the Obama-era agreement will not be available to him.
We are reminded of this aphorism because even though the year just started (President Trump is still trying to keep his job and President-elect Biden is still polishing his inaugural speech), Iran is already sending signals — lest anyone forget that it is there, waiting, and has expectations. Iran announced that it began enriching uranium to levels unseen since it signed the nuclear deal. The deal had capped the fissile purity to which Iran can refine uranium at 3.67%. Iran breached that cap in 2019, and its enrichment level remained steady at up to 4.5% since then. It is now moving to restore its 20% level enrichment.
What are these? These are signals.
Trump is no longer a threat. Negotiations with Biden are on the horizon. The Iranians must play as many cards as they have when they renegotiate a deal. If they enrich uranium to a higher level, giving up on enrichment is something they can trade for something else. If negotiations become difficult, they can up the ante and move from 20% enrichment to an even higher level.
The pressure is on the other side, namely, Biden. After the new president is inaugurated, he will have only a narrow window of time to reignite a process of negotiations. In March, Iran begins its new year and has a long holiday. When the holiday is over, the Iranian presidential campaign begins. So, from January to June, there is very little time to talk.
The United States wants Iran “to roll back its recent breaches, especially on uranium enrichment.” Iran wants U.S. sanctions lifted. Parties also need to consider Europe, not always unified, and China, whose reaction to Iran’s recent breach was: “China urges all sides to exercise calm and restraint, to stick to the commitments of the agreement and to refrain from taking actions that might escalate tensions, so as to make space for diplomatic efforts and a change in the situation.” There’s Israel, supported by the Saudis, Egypt and other Gulf states, who want any deal — the new deal because you can’t step into the same river twice — to correct some of the many flaws of the previous deal.
One question for Biden is this: Does he see the flaws? Would he be willing to acknowledge — not publicly for people to gloat but rather as a policy directive — that the previous agreement was flawed? The agreement was signed when he was the vice president, so admitting errors would be complicated for him and possibly embarrassing. Luckily, it has been a long time since the agreement was finalized, and Biden can also use Heraclitus to tell the Iranians that what they want is no longer available, neither for him nor for them.
True, Persians and Greeks did not always see the world in the same way. But Heraclitus is special. He lived in the city of Ephesus when it was part of the Persian Empire. At least some origins of his philosophy can be traced to Persian sources.
Did you enjoy this article?
You'll love our roundtable.
Editor's Picks
Israel and the Internet Wars – A Professional Social Media Review
The Invisible Student: A Tale of Homelessness at UCLA and USC
What Ever Happened to the LA Times?
Who Are the Jews On Joe Biden’s Cabinet?
You’re Not a Bad Jewish Mom If Your Kid Wants Santa Claus to Come to Your House
No Labels: The Group Fighting for the Political Center
Latest Articles
Three More Southern California Journalism Awards! Celebrating Stories from Antarctica, Ireland, and Inspiring Voices
Two Hundred and Five Years – A poem for Parsha Noach
Pico-Robertson Neighborhood Cleanup 2026 Recap
“I Love Life”: Paralyzed for Nearly Two Years, Dennis Prager Talks Gratitude and Happiness at Miami Gala
Memorial at Saban, Soraka Medical Center Mark Three Years Since Oct. 7; ‘Fauda’ Panel
Vegetarianism and Impossible Utopias
A Bisl Torah — Bar Mitzvah Lessons
Many reflect about children’s additional responsibilities as they take on their new title.
A Moment in Time: October 7 – Beyond Black and White
Thorns and Thistles and Two Trees in the Garden of Eden
Print Issue: Making Jewish Fiction New Again | October 16, 2026
In a climate of anti-Jewish censorship, a new fiction imprint from Wicked Son will play a part in determining the future of Jewish fiction in America.
Rabbis of LA | Rabbi Taff and Aliyah
First of two parts
Michael Douglas Memoir, ‘One Helluva Ride,’ Is a Helluva Read
At 82, Douglas has survived cancer, is married to the love of his life, Catherine Zeta-Jones, has been in iconic films including “Wall Street” and “Basic Instinct” and grew up with the pressure of having a famous father, the legendary actor Kirk Douglas.
A Burst of Inspirational Art in Hadassah
What makes them special, in addition to their ethereal beauty, is that four of the paintings are of women; two others, while abstract, appear to reference the female.
‘We Had a Mission to Tell the World Our Story’: ‘Fauda’ Creator Avi Issacharoff
It is Episodes 7 and 8, which take viewers back to Oct. 7, that have generated some of the strongest reactions from audiences around the world.
Three Years Later: 1-in-5 Israelis Report Severe Mental Health Impairment
PTSD diagnoses among children and adolescents in Israel rose almost 2.5-fold after Oct. 7. Clalit Health Services is reaching out to thousands of patients each week who have not reached out for any mental health treatment.
Jewish Charter Schools Take a Step Forward
The possibility of tuition-free Jewish religious education is moving closer to reality.
Jon Polin Wants Answers, Not Revenge, Three Years After Oct. 7
One day before the three-year anniversary of the Oct. 7th attacks, the father of slain hostage Hersh Goldberg-Polin called for a national commission of inquiry, spoke about what comes next for him and Rachel, and said punishment for Israel’s failures is not what he seeks.
Oct. 7 Survivors Share Stories of Loss, Courage and Resilience
The memorial event was organized by StandWithUs in partnership with the Israeli-American Council (IAC), American Jewish Committee (AJC) Los Angeles, Temple of the Arts, the Consulate General of Israel and The Jewish Journal.
“Seeing Reality Clearly”: Noa Tishby’s Oct. 7 Address
This speech is my honest look at where we are as a Jewish community.
Beit Issie Shapiro Gala Celebrates Resilience, Independence and the Power of Possibility
Among the evening’s highlights was an inspiring address by Israeli Paralympic champion Moran Samuel, 44, whose remarkable journey from tragedy to triumph captivated the audience.
Proposition 37: The California Middle-Class Homeownership Act and the Future of Jewish Community in Los Angeles
Housing costs affect whether younger families can remain near grandparents, educators can live near schools and congregations can sustain participation across generations.
Challahs in the Air — Rainbows Everywhere
Someday, I hope to make this rainbow challah with my granddaughters.
Table for Five: Noach
World Gone Wrong
Making Jewish Fiction New Again
In a climate of anti-Jewish censorship, a new fiction imprint from Wicked Son will play a part in determining the future of Jewish fiction in America.
Rosner’s Domain | Meet Galit: Israel’s Decider
If we are right, this election will be decided by a right-winger who agrees with her government on almost everything, except how hard to push.
Torah Portion: Noah
Here is yet another example of the Torah’s eternal relevance.
More news and opinions than at a Shabbat dinner, right in your inbox.