Charles H. Spurgeon on Psalms 90:3

Thou turnest man to destruction, etc. The prophet conceives of God as of a potter, that having of dust tempered a mass, and framed it into a vessel, and dried it, doth presently, within a minute or an hour after, dash it again in pieces, and beat it to dust, in passion as it were speaking unto it, "Get thee to dust again." The word here translated "destruction", signifies a beating, or grinding, or pounding of a thing to powder. And the prophet seems to allude to the third of Genesis, where God speaks of Adam, "Dust thou art, and to dust thou shalt return", as if he should say, O Lord, thou that hast made and framed man of the dust of the earth, thou beatest him to dust again; and as thou madest him by thy word alone, so with thy word thou suddenly turnest, and beatest him against to dust; as a man that makes a thing, and presently mars it again...He doth it with a word, against which is no resistance, when that word is once come out of his mouth; it is not all the diet, physic, and help, and prayers in the world that can save the life. And this he can do suddenly, in the twinkling of an eye. And therefore we should, as we love our lives, fear him, and take heed how we offend and displease him that can with a word turn the strongest man into dust. —William Bradshaw.