"Let us remember that sorrow alone is the creator of great things." — Ernest Renan

In morals, truth is but little prized when it is a mere sentiment, and only attains its full value when realized in the world as fact.

God, if there is a God, take my soul, if I have a soul.

The liberty of the individual is a necessary postulate of human progress.

The simplest schoolboy is now familiar with truths for which Archimedes would have sacrificed his life.