1-thessalonians 3:8

For now we live - Your steadfastness in the faith gives me new life and comfort; I now feel that I live to some purpose, as my labor in the Lord is not in vain.

For now we live, if ye stand fast in the Lord - This is equivalent to saying, "My life and comfort depend on your stability in the faith, and your correct Christian walk;" compare Martial 6:70. Non est vivere, sed valere, vita - "Life consists not merely in living, but in the enjoyment of health." See also Seneca, Epis. 99, and Manilius, 1 Thessalonians 4:5, as quoted by Wetstein. The meaning here is, that Paul now enjoyed life; he had that which constituted real life, in the fact that they acted as became Christians, and so as to show that his labor among them had not been in vain. The same thing here affirmed is true of all faithful ministers of the gospel. They feel that they have something that may be called life, and that is worth living for, when those to whom they preach maintain a close walk with God.

3:8 Now we live - Indeed; we enjoy life: so great is our affection for you.