It shall be health to thy navel, and marrow to thy bones.
– Proverbs 3:8
[F]ollowing the three previous directions will render benefits. Health has the thought of healing and marrow of moistening, thus strengthening the bones. The navel and the bones point to strengthening the body within and thereby working out. It’s a picture of how wisdom works. It gets within us and works out at our lips, hands, and feet. Also, in general terms, wisdom is a healthier way of life than the way of folly.