我们都受到自己天性的束缚。
It is the duty of a student to get everything out of a teacher， and the duty of a teacher to get everything out of a student.
Happiness is a good flow of life； the conviction that you are taking part in the universe's purpose.
幸福是生活的良好流动，一种深信自己参与了宇宙目的的信念。