Like smoke; which passeth away in obscurity, and swiftly, and irrecoverably. Or, into smoke; as wood or any combustible matter put into the fire wasteth away in smoke and ashes. My bones; the most strong and solid parts of my body, which seemed safest from the fire. Are burnt as an hearth; either as an hearth is heated or burnt up by the coals which are laid upon it; or as the hearth, being so heated, burns up that which is put upon it.
Related Commentaries of Psalms 102:3
Psalms 102:3
3 For my days are consumed like smoke, and my bones are burned as an hearth.