悲观主义者在每一个机会中看到困难，乐观主义者在每一个困难中看到机会。
A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty.
The greatest use of life is to spend it for something that will outlast it.
中国哲学的研究既需要历史的敏感，也需要哲学的严谨。