"We read to learn what others think. . ." What's the rest?

Question

I've seen a poster with a statement on it that went something like, "We read to learn what others think, Reflect to lean what we think and write to teach others."

What's the accurate wording and is there a source?

Answer 1

Reading furnishes the mind only with material for knowledge; it is thinking that makes what we read ours.

Locke, John