I always try to push my limits and see how far I can go.
The best way to learn mathematics is to do mathematics.
The mind, both in so far as it understands, and in so far as it imagines, is passive.
沙漠不能被声称或拥有——它是一块由风携带的布,从未被石头固定,被赋予了一百个变化的名字。