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What other dungeon is so dark as one's own heart. What jailer so inexorable as one's self?
Nathaniel Hawthorne

We learn by teaching.
Traditional Proverb

The place to improve the world is first in one's own heart and head and hands.
Robert M. Persig

There is no other Royal path which leads to geometry.
Euclid

And wisely tell what hour o' th' day The clock does strike by Algebra.
Samuel Butler

Mathematicians are like Frenchmen: whatever you say to them they translate into their own language and forthwith it is something entirely different.
Goethe

Pure math is, in its way, the poetry of logical ideas.
Roger Bacon

Writing Tutoring in Vincent