Some things are within our power, while others are not.

It is not things that disturb us, but our judgments about things.

Do not seek for things to happen as you wish; wish for them to happen as they do, and you will find peace.

We suffer not from events but from our judgments about them.

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

I'm convinced that about half of what separates successful entrepreneurs from unsuccessful ones is pure perseverance.

-- Steve Jobs