Confidence isn't optimism or pessimism, and it's not a character attribute. It's the expectation of a positive outcome.

The world is a great song, and we are the singers.

The best way to test a program is to test it.

希腊人理解事物隐藏面的神秘力量。他们留给我们语言中最美丽的词之一——"enthusiasm"——en theos——内在的神。

数学不仅仅是关于数字、方程、计算或算法，而是关于理解。

Hope is not a feeling; it is a doable thing.