Philippians 1:25

Having this confidence, I know that I shall abide - Convinced that it is necessary that I should live longer, for the spreading and defense of the Gospel, I am persuaded that I shall now be liberated. This was in fact the case, for, after having been two years in bonds at Rome, he was released.

For your furtherance - In the way of righteousness.

And joy of faith - And happiness in that way. The farther a man proceeds in the way of truth, the stronger his faith will be; and the stronger his faith, the greater his joy or happiness.