**About life in general.**

A great offense starts with solid defense. — Steve Kerr, *as a commentator inside the video game NBA Live 07*

We are what we repeatedly do. Excellence, then, is not an act but a habit. — Will Durant in *The Story of Philosophy*

When pressure rises, you don’t rise up to the occasion but instead fall back to your best preparations. — *Chris Voss* in *Never Split the Difference*

**About Mathematics.**

Archimedes will be remembered when Aeschylus is forgotten, because languages die and mathematical ideas do not. `Immortality’ may be a silly word, but probably a mathematician has the best chance of whatever it may mean. — *G.H. Hardy* in A Mathematician’s Apology

[Euclid’s proof that there are infinitely many prime numbers] is [demonstrated] by reductio ad absurdum, and reductio ad absurdum, which Euclid loved so much, is one of a mathematician’s finest weapons. It is a far finer gambit than any chess gambit: a chess player may offer the sacrifice of a pawn or even a piece, but a mathematician offers the game. — *G.H. Hardy* in A Mathematician’s Apology

God made the integers, all the rest is work of man. — *Leopold Kronecker*

Don’t remember it. Know it. — *Edward Perry, Department of Mathematics, University of Connecticut*

**Don’t just read it; fight it!** Ask your own question, look for your own examples, discover your own proofs. Is the hypothesis necessary? Is the converse true? What happens in the classical special case? What about the degenerate cases? Where does the proof use the hypothesis? — Paul Halmos

Understand it so well as if you might have discovered it yourself. — Donald Sheehy

A good idea has a way of becoming simpler and solving problems other than

that for which it was intended. — Robert Endre Tarjan

For us, there is no *ignorabimus *(Latin, meaning “we will not know”), and in my opinion none whatever in natural science. In opposition to the foolish *ignorabimus* our slogan shall be: *Wir müssen wissen — wir werden wissen.*^{} (German, meaning “we must know – we will know.”) — David Hilbert

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