{Through thy knowledge} (en t(8869) s(8869) gn(9373)ei). Literally, in
thy knowledge. Surely a poor use to put one's superior knowledge.
{Perisheth} (apollutai). Present middle indicative of the
common verb apollumi, to destroy. Ruin follows in the wake of
such daredevil knowledge. {For whose sake Christ died} (di' hon
Christos apethanen). Just as much as for the enlightened brother
with his selfish pride. The accusative (hon) with di' gives
the reason, not the agent as with the genitive in  8:6  (di'
hou). The appeal to the death (apethanen, second aorist active
indicative of apothn(8873)k(935c)) of Christ is the central fact that
clinches Paul's argument.