For we are but of yesterday
tmowl (tem-ole')
ago, i.e. a (short or long) time since; especially yesterday, or day before yesterday
and know
yada` (yaw-dah')
to know (properly, to ascertain by seeing); used in a great variety of senses, figuratively, literally, euphemistically and inferentially
nothing because our days
yowm (yome)
a day (as the warm hours),
upon earth
'erets (eh'-rets)
the earth (at large, or partitively a land) -- common, country, earth, field, ground, land, natins, way, + wilderness, world.
are a shadow
tsel (tsale)
shade, whether literal or figurative -- defence, shade(-ow).