Infallibility and invincible ignorance are the same thing.
Nature knows no difference between weeds and flowers.
Proverbial wisdom counsels against risk and change. But sitting ducks fare worst of all.
Profundity often goes past the issue to some deep but useless truth.
The noisy vacancy of youth, the quiet vacancy of age.
The beginning of self-knowledge: recognizing that your motives are the same as other people's.