The fool wonders, the wise man asks.

The praise of a fool is incense to the wisest of us

At thirty man suspects himself a fool; Knows it at forty, and reforms his plan; At fifty chides his infamous delay, Pushes his prudent purpose to resolve; In all the magnanimity of thought Resolves; and re-resolves; then dies the same

There is no wisdom like frankness

Man is more powerful than matter.

Increased means and increased leisure are the two civilizers of man