{Behold} (lepete). Same form for imperative present
active plural and indicative. Either makes sense as in  Joh 5:39 
eraunate and  14:1  pisteuete. {Calling} (kl(8873)in). The act
of calling by God, based not on the external condition of those
called (kl(8874)oi, verse  2 ), but on God's sovereign love. It is
a clinching illustration of Paul's argument, an _argumentum ad
hominen_. {How that} (hoti). Explanatory apposition to
kl(8873)in. {After the flesh} (kata sarka). According to the
standards of the flesh and to be used not only with sophoi
(wise, philosophers), but also dunatoi (men of dignity and
power), eugeneis (noble, high birth), the three claims to
aristocracy (culture, power, birth). {Are called}. Not in the
Greek, but probably to be supplied from the idea in kl(8873)in.