The passions are nothing else but ideas in their first phase of development; they are an attribute of the youth of the heart; and he is a fool who thinks he will be agitated by them all his life. Many a calm river begins as a turbulent waterfall, yet none hurtles and foams all the way to the sea. But that calm is often the sign of great, though concealed, strength; the plenitude and depth of feelings and thoughts does not tolerate frantic surgings; the soul, while experiencing pain or pleasure, gives itself a strict account of everything and becomes convinced that so it must be; it knows that without storms, a constantly torrid sun will wither it; it becomes penetrated with its own life, it fondles and punishes itself, as if it were a beloved child. Only in this supreme state of self-knowledge can a man evaluate divine justice.
Mikhail Lermontov, A Hero of Our Time (translated by Vladimir Nabokov)