it is easier to imagine oneself a king than to make oneself a king in reality.
 Bertrand Russell, A History of Western Philosophy (1945). copy citation

Context

“Who can be happy without flattery or without selflove? Yet such happiness is folly. The happiest men are those who are nearest the brutes and divest themselves of reason. The best happiness is that which is based on delusion, since it costs least: it is easier to imagine oneself a king than to make oneself a king in reality. Erasmus proceeds to make fun of national pride and of professional conceited almost all professors of the arts and sciences are egregiously conceited, and derive their happiness from their conceit. There are passages where the satire gives way to invective, and Folly utters the serious opinions of Erasmus;” source