John Gill's Bible Commentary Ver. 9. This is a faithful saying , etc.] A true one, and to be believed, that godliness has such promises annexed to it; (see 1 Peter 3:10,11 Matthew 6:33 Psalm 84:11,12). and worthy of all acceptation ; by all godly persons, to encourage them to the exercise of godliness.
Matthew Henry Commentary
Verses 6-10 - Outward acts of self-denial profit little. What will it avail us to mortify the body, if we do not mortify sin? No diligence in mer outward things could be of much use. The gain of godliness lies much in the promise; and the promises to godly people relate partly to the lif that now is, but especially to the life which is to come: though we lose for Christ, we shall not lose by him. If Christ be thus the Saviour of all men, then much more will he be the Rewarder of those wh seek and serve him; he will provide well for those whom he has made ne creatures.
Greek Textus Receptus
πιστος 4103 A-NSM ο 3588 T-NSM λογος 3056 N-NSM και 2532 CONJ πασης 3956 A-GSF αποδοχης 594 N-GSF αξιος 514 A-NSM
Robertson's NT Word Studies
4:9 See #1:15 for these very words, but here the phrase points to the preceding words, not to the following as there.