It is simplicity that makes the uneducated more effective than the educated when addressing popular audiences.

Conscientious and careful physicians allocate causes of disease to natural laws, while the ablest scientists go back to medicine for their first principles.

Maybe crying is a means of cleaning yourself out emotionally. Or maybe it's your last resort; the only way to express yourself when words fail, the same as when you were a baby and had no words.

All that one gains by falsehood is, not to be believed when he speaks the truth.

Opinion involves belief (for without belief in what we opine we cannot have an opinion), and in the brutes though we often find imagination we never find belief.

If then nature makes nothing without some end in view, nothing to no purpose, it must be that nature has made all of them for the sake of man.

I count him braver who overcomes his desires than him who conquers his enemies; for the hardest victory is over self.