I am neither bitter nor cynical but I do wish there was less immaturity in political thinking.

He who joyfully marches to music in rank and file has already earned my contempt. He has been given a large brain by mistake, since for him the spinal cord would suffice.

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

Few people think more than two or three times a year; I have made an international reputation for myself by thinking once or twice a week.

Most thinkers write badly, because they communicate not only their thoughts, but also the thinking of them.

If you want your life to be more rewarding, you have to change the way you think.