Wisdom

It is by the fortune of God that, in this country, we have three benefits: freedom of speech, freedom of thought, and the wisdom never to use either.
God (6), Countries (4), Wisdom (10), Freedom (4)Mark Twain (16)

Not everything that can be counted counts, and not everything that counts can be counted.
attributed
Wisdom (10), Everything (1)Albert Einstein (21)

Make everything as simple as possible, but not simpler.
Science (5), Wisdom (10)Albert Einstein (21)

If you're going through hell, keep going.
Hell (4), Wisdom (10)Winston Churchill (12)

If you want a thing done well, do it yourself.
Wisdom (10), Yourself (1)Napoleon (5)

What does not kill me makes me stronger.
May also be from Nietzsche.
Kill (2), Wisdom (10)Johann Wolfgang von Goethe (2)

Keep away from people who try to belittle your ambitions. Small people always do that, but the really great make you feel that you, too, can become great.
People (24), Wisdom (10)Mark Twain (16)

Never let your sense of morals prevent you from doing what's right.
Moral (1), Wisdom (10), Right (1)Isaac Asimov (3)

Don't bother just to be better than your contemporaries or predecessors. Try to be better than yourself.
Wisdom (10)William Faulkner (1)

When in doubt tell the truth.
Doubt (2), Truth (11), Wisdom (10)Mark Twain (16)