Entrepreneurship should be like playing mahjong, always maintaining excitement and tension.
Keep learning. It's the only way to stay relevant in a fast-changing world.
Freedom is not merely the opportunity to do as one pleases; neither is it merely the opportunity to choose between set alternatives. Freedom is, first of all, the chance to formulate the available choices, to argue over them - and then, the opportunity to choose.
The greatest problem for mathematicians now is probably the Riemann Hypothesis.
