Think like a novice user when making products.

These walls are kind of funny like that. First you hate them, then you get used to them. Enough time passed, get so you depend>

Every tree planted today is a legacy for tomorrow.

Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

The history of mathematics is a history of human curiosity and ingenuity.

Good is indefinable.

摆脱诱惑的唯一方法就是屈服于它。