Heraclitus (535–476 BC) was a pre-Socratic Greek philosopher best known for saying, No man ever steps in the same river twice. In addition to the idea that all things are constantly changing, he also believed in the unity of opposites, and an underlying non-changing principle, or law, called Logos. Read more at Stanford Encyclopedia of Philosophy, and see some of his famous sayings.
Billy Collins, in his New York Times Bestseller, Aimless Love: New and Selected Poems, humorously disagrees with Heraclitus. It’s on page 222, and never fails to crack me up!
Heraclitus on Vacation
It is possible to stick your foot
into the same swimming pool twice,
dive, or even cannonball
into the deep or shallow end
as many times as you like
depending on how much you had to drink.
© by Billy Collins, 2013, Random House
For more about Billy Collins on this blog, see this two-part post: Billy Collins suggests more creative ways to respond to poetry than analyzing it to death, followed by: Billy Collins discusses the value of getting to the end of a poem and what can happen afterwards. Enjoy the poetic genius and humor of Billy Collins reading his poem “January in Paris”.