When all else is lost, the future still remains.

If a window of opportunity appears, don't pull down the shade.

A little learning is a dangerous thing; Drink deep, or taste not the Pierian spring.

I know not age, nor weariness nor defeat.

I don't pretend we have all the answers. But the questions are certainly worth thinking about.

You teach best what you most need to learn.

A physician without a knowledge of Astrology has no right to call himself a physician.

The smallest deed is better than the greatest intention.

In complete darkness we are all the same, it is only our knowledge and wisdom that separates us, don't let your eyes deceive you.

The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes.