La luz más intensa nace de las sombras más profundas.
我们不是从祖先那里继承海洋,而是从子孙那里借来的。
Mathematics is not a deductive science—that's a cliché. When you try to prove a theorem, you don't just list the hypotheses and then start to reason. What you do is trial and error, experimentation, guesswork.