5: Indeed,You have made my days as handbreadths,
And my age is as nothing before You;
Certainly every man at his best state is but vapor. Selah
6: Surely every man walks, about like a shadow;
*handbreadths-width of the palm of the hand.
*Selah-(1) a word which appears in the Psalms 71 times.
it's probably a musical note, or pause.