Now do you understand why a soul loses all sense of peace and serenity when it turns away from its goal, and forgets that it was created by God to be a saint? Strive never to lose this supernatural outlook, not even at times of rest or recreation, which are as important in our daily lives as is work itself.
You can climb to the top of your profession, you can gain the highest acclaim as a reward for your freely chosen endeavors in temporal affairs; but if you abandon the supernatural outlook that should inspire all our human activities, you will have gone sadly astray.
(…)I was saying just now that though you might achieve spectacular success in society, in public affairs, in your own careers, if you neglect your spiritual life and ignore Our Lord you will end up a complete failure. As far as God is concerned — and in the last analysis that is the only thing that matters — victory only comes to those who strive to behave as genuine Christians. There is no middle way. That is why you find so many people who from a human point of view ought to be ever so happy, yet they go about uneasy and embittered. They appear to be overflowing with happiness, but just scratch beneath the surface of their souls and you will discover a bitterness more bitter than gall. This will not happen to us, provided we really try, day in day out, to do God's will, to give him glory, and praise him and spread his kingdom to all mankind.
(Friends of God, 10-12)