The only way to have a friend is to be one.
唯一交到朋友的方法就是自己先成为朋友。
The only limit to our realization of tomorrow will be our doubts of today.
心理学必须是一门现象的科学,而非本体。
On choosing friends: "Life's too short to hang out with people who aren't resourceful."
The reward of seeing the joy on the faces of the parents is immense.