Nourishment refers to much more than a healthy diet. It is the care-giving function of man. Eating properly implies care for oneself; providing healthy meals in the home is a sign of caring for the family. The writer of a great book or composer of a wonderful piece of music also provides nourishment, in these cases to humanity in general, by caring deeply about his or her work.
You can know people by observing what they choose to nourish in their own lives. Do they feed and develop their own bodies? Do they cultivate their spirits, their intellects, their moral values? Do they nourish (that is, care for) those around them, and if so, to whom do they devote their energies? The most successful people are temperate in eating and drinking, thinking and dreaming. They strengthen the world by nurturing the higher nature in man.