About God, I cannot accept any concept based on the authority of the Church... As long as I can remember. I have resented mass indoctrination. I cannot prove to you there is no personal God, but if I were to speak of him, I would be a liar. I do not believe in the God of theology who rewards good and punishes evil. His universe is not ruled by wishful thinking, but by immutable laws

My scientific work is motivated by an irresistible longing to understand the secrets of nature not by other feelings.

The religion of the future will be cosmic religion. It will transcend personal God and avoid dogma and theology.

Without the sense of fellowship with men of like mind, of preoccupation with the objective, the eternally unattainable in the field of art and scientific research, life would have seemed to me empty.

I love Humanity but I hate humans

Great spirits have always encountered violent opposition from mediocre minds.

An empty stomach is not a good political adviser.