The connoisseur of art must be able to appreciate what is simply beautiful, but the common run of people is satisfied with ornament.

Theories are usually the over-hasty efforts of an impatient understanding that would gladly be rid of phenomena, and so puts in their place pictures, notions, nay, often mere words.

We are never deceived; we deceive ourselves.

This is what they all come to who exclusively harp on experience. They do not stop to consider that experience is only one half of experience.

The human mind will not be confined to any limits.

Just begin and the mind grows heated; continue, and the task will be completed!

Master and Doctor are my titles; for ten years now, without repose, I held my erudite recitals and led my pupils by the nose.