Shrinking away from death is something unhealthy and abnormal which robs the second half of life of its purpose.

Mistakes are, after all, the foundations of truth, and if a man does not know what a thing is, it is at least an increase in knowledge if he knows what it is not.

I know only that I was born and exist, and it seems to me that I have been carried along. I exist on the foundation of something I do not know. In spite of all uncertainties, I feel a solidity underlying all existence and a continuity in my mode of being.

Our whole educational problem suffers from a one-sided approach to the child who is to be educated, and from an equally one-sided lack of emphasis on the uneducatedness of the educator.

The only thing we have to fear on this planet is man.

The self is defined psychologically as the psychic totality of the individual. Anything that a [person] postulates as being a greater totality than [oneself] can become a symbol of the self. For this reason the symbol of the self is not always as total as the definition would require.

Even a lie is a psychic fact.