"We should be agnostic about those things for which there is no evidence. We should not hold beliefs merely because they gratify our desires for afterlife, immortality, heaven, hell, etc."

"Earlier religions and belief-systems were largely adaptations to cope with man's ignorance and fears, with the result that they came to concern themselves primarily with stability of attitude. But the need today is for a belief system adapted to cope with his knowledge and his creative possibilities; and this implies the capacity to meet, inspire, and guide change. ... The primary function of any [belief] system today must be to utilize all available knowledge in giving guidance and encouragement for the continuing adventure of human development."
Religion without Revelation.