Albert Barnes Commentary Titus 3:7

"that, being justified by his grace, we might be made heirs according to the hope of eternal life." — Titus 3:7 (ASV)

That being justified by his grace. Not by our own works, but by his favour or mercy. (See the notes on Romans 3:24).

We should be made heirs. (Romans 8:15, 17).

According to the hope of eternal life. In reference to the hope of eternal life; that is, we have that hope in virtue of our being adopted into the family of God, and being made heirs. He has received us as his children, and permits us to hope that we shall live with him forever.