If I steal money from any person, there may be no harm done from the mere transfer of possession; he may not feel the loss, or it may prevent him from using the money badly. But I cannot help doing this great wrong towards Man, that I make myself dishonest.

To sum up: it is wrong always, everywhere, and for anyone, to believe anything upon insufficient evidence.

The harm which is done by credulity in a man is not confined to the fostering of a credulous character in others, and consequent support of false beliefs.

William Kingdon Clifford Quotes