Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
An idea that is not dangerous is unworthy of being called an idea at all.
The two most important days in your life are the day you are born and the day you find out why.
有些人去找牧师;有些人去找诗歌;我则去找我的朋友。
The best forestry practices are those that leave no trace but leave everything changed.