"The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart."

A person may cause evil to others not only by his actions but by his inaction， and in either case， he is justly accountable to them for the injury.

写作是探索生命奥秘的一种方式。

科学是一个微分方程。宗教是一个边界条件。