One who has a why can endure anyhow.
That which does not kill us makes us stronger.
He who cannot give anything away cannot feel anything either.
The poison by which the weaker nature is destroyed is strengthening to the strong individual and he does not call it poison.
Free will without fate is no more conceivable than spirit without matter, good without evil.
All mankind is divided, as it was at all times and is still, into slaves and freemen.