The general knowledge of mankind has been more effectively promoted by fear than by love; for fear tries to find out who the other is, what he knows, what he wants: it would be hazardous and detrimental to be deceived on this head. Love, on the other hand, has a secret craving to discover in the loved object as many beautiful qualities as possible, or to raise him as highly as possible: to be thus deceived would be delightful and propitious, – wherefore love indulges in it.
The dawn of day by Friedrich Nietzsche