Look before you leap.
He who hesitates is lost.
A bird in the hand is worth two in the bush.
A man is not finished when he is defeated, he is finished when he quits.
Whatever is given, can be just as easily taken away.
That which does not kill us, makes us stronger.
Make haste, slowly.
...we choose to go to the moon and do the other things, not because they are easy, but because they are hard.
Tell me who your friends are, and I will tell you who you are.
Keep your friends close, but keep your enemies closer.
Truth is hate, to those who hate the truth.