Titus 3:8

Ver. 8. Faithful is this saying (that, namely, contained in the immediately preceding verses respecting God's method of procedure in respect to salvation; for the form of expression, see at 1 Timothy 1:5); and concerning these things I would have thee strenuously affirm (διαβεβαιοῦσθαι, make asseveration; see at 1 Timothy 1:7), to the end that they who have believed God be careful to practise good works προΐστασθαι, set forward, practise such works. The governing verb φροντίζειν, which is sometimes, though rarely, as here, followed by an infinitive, nowhere again occurs in Scripture; but it denotes the application of earnest and continued thought, a careful striving of soul in this direction, that the belief in the doctrines of the gospel should be substantiated by a steady performance of its commanded duties. These things namely, the things involved in this practical teaching and concern are good and profitable to men: in themselves good (καλὰ), and in their tendency and results profitable (ὠφέλιμα) to others.