Invert, always invert.

Spend each day trying to be a little wiser than you were when you woke up.

To a man with a hammer, everything looks like a nail.

It is remarkable how much long-term advantage people like us have gotten by trying to be consistently not stupid, instead of trying to be very intelligent.

I constantly see people rise in life who are not the smartest, sometimes not even the most diligent, but they are learning machines.

Endure and renounce.

-- Epictetus

Fire tests gold; adversity tests strong people.

-- Seneca

Bodily pain does not last without limit; intense pain is brief in duration.

-- Epicurus

If you carve without ceasing, even metal and stone can be engraved.

-- Xunzi

He who has a why to live can bear almost any how.

-- Friedrich Nietzsche

Energy and persistence conquer all things.

-- Benjamin Franklin