"In the study of algorithms, we often find that the most efficient solutions are also the most elegant."

History is not the past. It is the method we have evolved of organizing our ignorance of the past.

The mind， both in so far as it understands， and in so far as it imagines， is passive.

We are the sum of our ancestors' struggles.

解释：帮助困难的人毫不倦怠，追求善行从不满足。