What does this quote mean?

“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.

“For life goes not backward nor tarries with yesterday.”

Life continues forward despite attachment to what has already happened, so care for the past cannot make the present remain there.

Source note: The Prophet, “On Children”; Gibran contrasts parents’ memory of yesterday with children belonging to a life that moves forward.

“The readiness is all.”

The emphasis is not on controlling every outcome but on meeting what comes with preparedness and acceptance.

Source note: Act 5, Scene 2.

“It is not a lost year, but one that may prove the most helpful of any you ever know.”

A painful or disappointing period can still become useful experience when it changes judgment, humility, resolve, and the way a person begins again.

Source note: Jo's Boys; the reassurance follows a setback and reframes a difficult year as experience that may later prove unusually helpful rather than simply wasted time.

“The course of life is fixed, and nature admits of its being run but in one way, and only once.”

Each stage of life occurs only once, so wisdom includes accepting its appropriate strengths instead of endlessly trying to restore an earlier stage.

Source note: Cato on Old Age, Shuckburgh translation, in Cicero’s discussion of the distinctive advantages of each season of life.

“Demand not that events should happen as you wish; but wish them to happen as they do happen, and you will go on well.”

Peace is sought by aligning desire with reality rather than requiring reality to obey preference, a central Stoic distinction between response and circumstance.

Source note: Enchiridion, section 8; Epictetus applies Stoic acceptance to events outside personal control.