The only way to learn mathematics is to do mathematics.

A good abstraction is one that captures the essential aspects of a concept while ignoring the irrelevant details.

Sometimes, the hardest battles are fought within the confines of our own minds.

"To write is to carve your soul into words and hope someone recognizes the shape."

I don't need a hero. I am my own hero.

Anyone who keeps the ability to see beauty never grows old.

译文：纵欲放荡、消极怠慢就不能勉励心志使精神振作，冒险草率、急躁不安就不能修养性情。赏析：我们要是一直沉迷于物质享受，贪图享乐，做任何事就会消极懈怠。做事草率鲁莽，浮浮躁躁的，事情也会难以成功。