A doubtful friend is worse than a certain enemy. Let a man be one thing or the other, and we then know how to meet him.
When you want to win a game, you have to teach. When you lose a game, you have to learn.
One funny thing is, though, I wear my watch on my right hand and I'm actually right-handed. People always wonder why - I don't know myself, I've just always done it that way and I like it the way a good watch fits on my right wrist.