I have that assurance God gave to St. Paul and he passed on to us: My grace is sufficient for you. And what is grace? Participation in the divine life. And that participation means for me, light and understanding and conviction, of course only occasionally, but strong enough to carry me along, to lift me up out of depression, discouragement, uncertainty, doubt. . .The frustrations that we experience are exercises in faith and hope, which are supernatural virtues. With prayer, one can go on cheerfully and even happily, while without prayer, how grim is the journey. Prayer is as necessary to life as breathing.