In the welter of conflicting fanaticisms, one of the few unifying forces is scientific truthfulness, by which I mean the habit of basing our beliefs … - Bertrand Russell

Take the question whether other people exist. ...It is plain that it makes for happiness to believe that they exist – for even the greatest misanthropist would not wish to be deprived of the objects of his hate. Hence the belief that other people exist is, pragmatically, a true belief. But if I am troubled by solipsism, the discovery that a belief in the existence of others is 'true' in the pragmatist's sense is not enough to allay my sense of loneliness: the perception that I should profit by rejecting solipsism is not alone sufficient to make me reject it. For what I desire is not that the belief in solipsism should be false in the pragmatic sense, but that other people should in fact exist. And with the pragmatist's meaning of truth, these two do not necessarily go together. The belief in solipsism might be false even if I were the only person or thing in the universe.

Science may set limits to knowledge, but should not set limits to imagination.

Apart from logical cogency, there is to me something a little odd about the ethical valuations of those who think that an omnipotent, omniscient, and benevolent Deity, after preparing the ground by many millions of years of lifeless nebulae, would consider Himself adequately rewarded by the final emergence of Hitler and Stalin and the H-bomb.