"It is difficult to get a man to understand something when his salary depends on his not understanding it." -Upton Sinclair "It is useless to argue with a man

"It is difficult to get a man to understand something when his salary depends on his not understanding it." -Upton Sinclair "It is useless to argue with a man whose opinion is based upon a personal or pecuniary interest; the only way to deal with him is to outvote him." -William Jennings Bryan "Hear, hear! It’s all a question of trusts and monopolies. Doctors have a monopoly of medicine just as parsons have of God. You can’t get a parson to admit the arguments of an agnostic, because his salary depends on his not letting the agnostic refute him; and you can’t get an ordinary doctor to look kindly on psychoanalysis or autosuggestion because their success would make him superfluous. All this is not a question of the Life Force at all; it is a question of bread and butter." -C. E. M. Joad