Think of yourself as on the threshold of unparalleled success. A whole, clear, glorious life lies before you. Achieve! Achieve!

What can be added to the happiness of a man who is in health, out of debt, and has a clear conscience?

To keep the body in good health is a duty... otherwise we shall not be able to keep our mind strong and clear.

Who can (make) the muddy water (clear)? Let it be still, and it will gradually become clear.