A law of nature， lex naturalis， is a precept or general rule found out by reason， by which a man is forbidden to do that which is destructive of his life or takes away the means of preserving the same.

Dearer than eye-sight, space, and liberty; Beyond what can be valued, rich or rare;

Innovation in leather tanning isn't just about technology; it's about respecting the craft while evolving it.

译文：江头上的风波还不算最险恶的，人间的道路比这还要难行得多!

Infinity is the core of my art.

The secret of a happy old age is to have a good memory and a bad one.

The essence of mathematics lies in its power to reveal patterns and symmetries.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.