Albert Einstein didn't merely disbelieve or even deny the existence of the sort of god traditionally asserted in monotheistic religions. Albert Einstein went so far as to deny that such gods could even be moral, if religious claims about them were true. Gods which presume to reward good and punish evil would themselves be immoral - especially if they were omnipotent and thus ultimately responsible for every event. Gods that reflect human frailty are not moral gods.
1. Albert Einstein: Omnipotent God Cannot Pass Judgment on Humanity
If this being is omnipotent, then every occurrence, including every human action, every human thought, and every human feeling and aspiration is also His work; how is it possible to think of holding men responsible for their deeds and thoughts before such an almighty Being? In giving out punishment and rewards He would to a certain extent be passing judgment on Himself. How can this be combined with the goodness and righteousness ascribed to Him?
- Albert Einstein, Out Of My Later Years
2. Albert Einstein: I Do Not Believe in a God Rewarding Good, Punishing Evil
I do not believe in the God of theology who rewards good and punishes evil.
- Albert Einstein, quoted by editor William Miller in Life, May 2, 1955
3. Albert Einstein: I Do Not Believe in a God that Could Have Experiences Like Us
I cannot conceive of a God who rewards and punishes his creatures, or has a will of the kind that we experience in ourselves. Neither can I nor would I want to conceive of an individual that survives his physical death; let feeble souls, from fear or absurd egoism, cherish such thoughts. I am satisfied with the mystery of the eternity of life and with the awareness and a glimpse of the marvelous structure of the existing world, together with the devoted striving to comprehend a portion, be it ever so tiny, of the Reason that manifests itself in nature.
- Albert Einstein, The World As I See It
4. Albert Einstein: I Cannot Believe in a God that Reflects Human Frailty
I cannot imagine a God who rewards and punishes the objects of his creation, whose purposes are modeled after our own -- a God, in short, who is but a reflection of human frailty. Neither can I believe that the individual survives the death of his body, although feeble souls harbor such thoughts through fear or ridiculous egotisms.
- Albert Einstein, obituary in New York Times, 19 April 1955