What does this quote mean?

“My trade and art is to live.”

Montaigne makes lived experience itself the central field of inquiry, treating ordinary life as material for reflection rather than a distraction from philosophy.

Source note: Essays of Montaigne, Book II, Charles Cotton translation; the sentence introduces his claim to speak from his own experience.

“Circumstance does not make the man; it reveals him to himself.”

Circumstances can expose habits of thought and character that were already present, turning difficulty into information about what needs attention or change.

Source note: As a Man Thinketh; Allen uses circumstance as a mirror for character and habitual thought.

“Progress, far from consisting in change, depends on retentiveness.”

Change by itself is not improvement; progress requires preserving useful lessons and achievements while moving beyond what no longer works.

Source note: The Life of Reason, Reason in Common Sense; the sentence follows Santayana’s discussion of memory and historical learning.

“In a world where all is fleeting, change alone endures.”

Stability is temporary, so practical judgment requires expecting change rather than treating present arrangements as permanent.

Source note: Counsels and Maxims, T. Bailey Saunders translation, in a discussion of fortune and apparent stability.

“Experience is merely the name men gave to their mistakes.”

The wit turns “experience” into a retrospective label for errors, suggesting that mistakes become useful only when understood.

Source note: The Picture of Dorian Gray, 1891 edition, Chapter 4; third-person narration focalized through Lord Henry reflects that experience is the name people give to their mistakes.

“Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.”

Good relationships can improve judgment and character through challenge, conversation, and mutual influence.

Source note: Proverbs 15:1 in the King James Version; the proverb contrasts a soft answer with speech that intensifies wrath.