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.

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

The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.

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

Paper is to write things down that we need to remember. Our brains are used to think.

What important is man should live in righteousness, in natural love for mankind.