Everything is simpler than you think and at the same time more complex than you imagine

With knowledge grows doubt.

I will listen to anyone's convictions, but pray keep your doubts to yourself.

Happy the man who early learns the wide chasm that lies between his wishes and his powers.

It is belief in the Bible, the fruits of deep meditation, which has served me as the guide of my moral and literary life. I have found capital safely invested and richly productive of interest, although I have sometimes made but a bad use of it.

The human mind will not be confined to any limits.

Art is long, life short, judgment difficult, opportunity transient. To act is easy, to think is hard; to act according to our thought is troublesome. Every beginning is cheerful: the threshold is the place of expectation.