“Growing older gracefully means having a keen curiosity about learning things about the world that you didn’t know yesterday, no matter how many yesterdays you've had.”

2010s
Context: The problem, often not discovered until late in life, is that when you look for things like love, meaning, motivation, it implies they are sitting behind a tree or under a rock. The most successful people recognize, that in life they create their own love, they manufacture their own meaning, they generate their own motivation. For me, I am driven by two main philosophies, know more today about the world than I knew yesterday. And along the way, lessen the suffering of others. You'd be surprised how far that gets you.

Source: How to Stop Worrying and Start Living (1948), p. 237. Part 8 : How I Conquered Worry,

Combien de choses nous servoyent hier d’articles de foy, qui nous sont fables aujourd’huy?
Book I, Ch. 27
Essais (1595), Book I
Source: The Complete Essays

Source: Short fiction, The Man Who Sold The Stars (2013), p. 342

Source: Reengineering the Corporation, 1993, p. 2

Variant: The future you have, tomorrow, won't be the same future you had, yesterday.
Source: Rant

Source: The Sisterhood of the Traveling Pants

“We don’t,” she said, somewhat shamefaced. “But we learned to read, and once one can read, one can learn anything.”
Source: Singer from the Sea (1999), Chapter 17, “Merdune Lagoon” (p. 272)