Brutes leave ingratitude to man.
In order to try whether a vessel be leaky, we first prove it with water before we trust it with wine.
Ignorance lies at the bottom of all human knowledge, and the deeper we penetrate, the nearer we arrive unto it.
Most men know what they hate, few what they love.
Doubt is the vestibule of faith.
There are two things which ought to teach us to think but meanly of human glory; the very best have had their calumniators, the very worst their panegyrists.