World Wide Study Bible
a Bible passage
9But they will not make much progress, because, as in the case of those two men, their folly will become plain to everyone.
9. they shall proceed no further—Though for a time (2Ti 2:16) "they shall advance or proceed (English Version, 'increase') unto more ungodliness," yet there is a final limit beyond which they shall not be able to "proceed further" (Job 38:11; Re 11:7, 11). They themselves shall "wax worse and worse" (2Ti 3:13), but they shall at last be for ever prevented from seducing others. "Often malice proceeds deeper down, when it cannot extend itself" [Bengel].
their folly—literally, "dementation": wise though they think themselves.
shall be manifest—Greek, "shall be brought forth from concealment into open day" [Bengel], (1Co 4:5).