No one knows what he can do until he tries.

The best preparation for tomorrow is doing your best today.

The pessimist sees difficulty in every opportunity. The optimist sees opportunity in every difficulty.

We are not what we know but what we are willing to learn.

You become what you give your attention to.

I'd rather regret the things I've done than regret the things I haven't done.

Once you replace negative thoughts with positive ones, you'll start having positive results.