Tempered, gradual animation, the methodical restrain of sensations and energies, the equilibrium of sickness and health in each creature--this is nature's essence, its immutable law, this is what it's based on and what it adheres to.
Ivan TurgenevAll human beings hang by a thread, an abyss may open under their feet at any moment, and yet they have to go and invent all sortsof difficulties for themselves and spoil their lives.
Ivan Turgenev