Full Idea
All things are changing; and you yourself are in continuous mutation and in a manner in continuous destruction, and the whole universe too.
Gist of Idea
Everything is changing, including yourself and the whole universe
Source
Marcus Aurelius (The Meditations (To Himself) [c.170], 9.19)
Book Reference
'Essential Works of Stoicism', ed/tr. Hadas,Moses [Bantam 1961], p.174
A Reaction
Undeniable, but not much point in brooding on it. You become conscious of mutation if you hope to remain unchanged, but if you go with the flow mutation is normality.