Psychology must be independent of philosophy and physiology.

We don’t inherit the earth from our ancestors; we borrow it from our children.

Life is not easy for any of us. But what of that? We must have perseverance and above all confidence in ourselves. We must believe that we are gifted for something and that this thing must be attained.

生物的美不在于组成它的原子，而在于这些原子如何被组合在一起。