Anyone can be a genius, if they pick just one specific subject and study it diligently just 15 minutes each day.

My intellectual development was retarded, as a result of which I began to wonder about space and time only when I had already grown up.

Where there is love, there is no imposition.

The only justification for our concepts and systems of concepts is that they serve to represent the complex of our experiences; beyond this they have not legitimacy.

I do not believe in the God of theology who rewards good and punishes evil. My God created laws that take care of that. His universe is not ruled by wishful thinking, but by immutable laws.

Imagination is more powerful than knowledge.

A new idea comes suddenly and in a rather intuitive way, but intuition is nothing but the outcome of earlier intellectual experience.