Prophesying was the only human art that couldn't be improved by practice.
艺术作品是灵魂的镜子。
保持好奇心，保持对世界的好奇心。
All mankind... being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.
A good mathematician is someone who can see analogies between theorems. A great mathematician is someone who can see analogies between analogies.