Expositor's Bible Commentary Commentary Titus 1:13

"This testimony is true. For which cause reprove them sharply, that they may be sound in the faith," — Titus 1:13 (ASV)

(13a) Paul’s own observations confirm the adverse judgment. Probably he had some unpleasant experiences on the island that verified the verdict.

(13b) “Therefore” introduces the action demanded by this situation. Titus must continue to “rebuke them sharply,” dealing pungently and incisively with the danger, like a surgeon cutting away cancerous tissue. “Rebuke” (GK 1794) may be rendered “convict,” effectively showing the error of the teaching that is being opposed. “Them” refers directly to the false teachers, who must obviously be dealt with whenever they seek to gain a hearing in the church. But it seems clear that the action demanded also includes those church members who were known to be receptive to the claims of the false teachers.

The positive result aimed at is “that they will be sound [lit., healthy; GK 5617] in the faith,” i.e., in the truth embodied in the Gospel they have personally accepted. Their personal spiritual health will be impaired if they feed on unhealthy doctrine.