It is well known that apes in the wild offer spontaneous assistance to each other, defending against leopards, say, or consoling distressed companions with tender embraces.

Wealth is well known to be a great comforter.

Persian social manners are well known, and there is no other society that can compete with them.

Experiments with animals have long been handicapped by our anthropocentric attitude: We often test them in ways that work fine with humans but not so well with other species.

Words, as is well known, are the great foes of reality.

The great writers of aphorisms read as if they had all known each other well.