Charles H. Spurgeon on Psalms 49:13

Their vain confidences are not casual aberrations from the path of wisdom, but their way, their usual and regular course; their whole life is regulated by such principles. Their life path is essential folly. They are fools ingrain. From first to last brutishness is their characteristic, grovelling stupidity the leading trait of their conduct. Yet their posterity approve their sayings. Those who follow them in descent follow them in folly, quote their worldly maxims, and accept their mad career as the most prudent mode of life. Why do they not see by their father's failure their father's folly? No, the race transmits its weakness. Grace is not hereditary, but sordid worldliness goes from generation to generation. The race of fools never dies out. No need of missionaries to teach men to be earthworms, they crawl naturally to the dust. Selah. Well may the minstrel pause, and bid us muse upon the deep seated madness of the sons of Adam. Take occasion, reader, to reflect upon thine own.