I have been influenced in my thinking by both west and east.

The man who doesn't make up his mind to cultivate the habit of thinking misses the greatest pleasure in life.

There is nothing either good or bad but thinking makes it so.

Thinking is the hardest work there is, which is probably the reason so few engage in it.

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.

The whole of science is nothing more than a refinement of everyday thinking.