The beauty of a mathematical proof is in its elegance and the way it reveals the underlying truth in a clear and concise manner.

Money is overrated. Truly new things rarely need an abundance of money. If that was so， billionaires would have a monopoly on inventing new things， and they don’t. Instead almost all breakthroughs are made by those who lack money， because they are forced to rely on their passion， persistence and ingenuity to figure out new ways. Being poor is an advantage in innovation.

从错误中学习，但不要让它们定义你。