Keep my commandments, and live; and my law as the apple of thine eye.
– Proverbs 7:2
Wisdom is life and leads us into life. The many admonitions to keep, or guard, the commandments indicate how easily we can let them slip. We must stir up ourselves to actively keep them. We are to guard as “the apple of thine eye.” This refers to the pupil, but the figure is probably used because the commandments of wisdom give us spiritual sight and must be guarded.