Excerpted from Calaprice. See pp. 145 - 161.
I would not think that philosophy and reason themselves will be man's guide in the foreseeable future; however, they will remain the most beautiful sanctuary they have always been for the select few.
— Letter to Benedetto Croce, June 7, 1944; Einstein Archive 34-075; also quoted in Pais, Einstein Lived Here p. 122
Mere unbelief in a personal God is no philosophy at all.
— Letter to V. T Aaltonen, May 7, 1952, on his opinion that belief ill a personal God is better than atheism Einstein Archive 59-059
I consider the Society of Friends the religious community which has the highest moral standards. As far as I know, they have never made evil compromises and are always guided by their conscience. In international life, especially, their influence seems to me very beneficial and effective.
—Letter to A. Chapple, Australia, February 23, 1954; Einstein Archive 59-405; also quoted in Nathan and Norden, Einstein on Peace P. 510
A man's moral worth is not measured by what his religious beliefs are but rather by what emotional impulses he has received from Nature during his lifetime.
— To Sister Margrit Goehner, February 1955; Einstein Archive 59-831