When wisdom entereth into thine heart, and knowledge is pleasant unto thy soul;
Ver. 10. Is pleasant to thy soul.] Spiritual joy mortifies sin. His mouth hankers not after homely provision that hath lately tasted of delicate sustenance. Pleasure there must be in the ways of God, because therein men let out their souls into God, that is the fountain of all good; hence they so infinitely distaste sin's tasteless fooleries. Crede mihi, res severa est verum gaudium, saith Seneca. True joy is a solid business.