Nourishment - (Webster's 1828 Dictionary)
1. That which serves to promote the growth of animals or plants, or to repair the waste of animal bodies; food; sustenance; nutriment.
2. Nutrition; support of animal or vegetable bodies.
3. Instruction, or that which promotes growth in attainments; as nourishment and growth in grace.
So they may learn to seek the nourishment of their souls.