Who said "I learned early on that we are not promised tomorrow."?

This quote is attributed to Patroclus.

I learned early on that we are not promised tomorrow. - Patroclus

"I learned early on that we are not promised tomorrow."

Patroclus Time

Character in The Song of Achilles

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"paraphrased idea about devotion to Achilles"

"I am made of memories."

"I could recognize him by touch alone, by smell; I would know him blind, by the way the air moved around him."

"I have never known the world where I was not waiting for him."

"Time waits for no one."

"Time spent with loved ones is never wasted."

"I've been alive for a long time. Long enough to know that you can't trust anyone."

"The past always catches up with you."