The Danger of Believing Unproven Things

... If I let myself believe anything on insufficient evidence, there may be no great harm done by the mere belief; it may be true after all, or I may never have occasion to exhibit it in outward acts. But I cannot help doing this great wrong towards Man, that I make myself credulous. The danger to society is not merely that it should believe wrong things, though that is great enough; but that it should become credulous, and lose the habit of testing things and inquiring into them; for then it...

 1973 Humanist Manifesto II - Religion

Religion FIRST: In the best sense, religion may inspire dedication to the highest ethical ideals. The cultivation of moral devotion and creative imagination is an expression of genuine "spiritual" experience and aspiration. We believe, however, that traditional dogmatic or authoritarian religions that place revelation, God, ritual, or creed above human needs and experience do a disservice to the human species. Any account of nature should pass the tests of scientific evidence; in our judgm...