Scientific research can reduce superstition by encouraging people to think and view things in terms of cause and effect.

The trouble with the younger generation is that they don't stay young for very long.

Classical thermodynamics ... is the only physical theory of universal content which I am convinced ... will never be overthrown.

Rejoice with your family in the beautiful land of life.

Only the Catholic Church protested against the Hitlerian onslaught on liberty. Up till then I had not been interested in the Church, but today I feel a great admiration for the Church, which alone has had the courage to struggle for spiritual truth and moral liberty

We still do not know one thousandth of one percent of what nature has revealed to us.

The main task of the spirit is to free man from his ego.