This hypothesis (Parallel hypothesis) would not destroy itself at all easily.
Johann Heinrich LambertProofs of the Euclidean [parallel] postulate can be developed to such an extent that apparently a mere trifle remains. But a careful analysis shows that in this seeming trifle lies the crux of the matter; usually it contains either the proposition that is being proved or a postulate equivalent to it.
Johann Heinrich LambertThe first object of my endeavours was the means to become perfect and happy.
Johann Heinrich Lambert