The pursuit of human glory, we maintain, is forbidden not only by the teaching of Jesus, but also by the Old Testament. Accordingly we find one of the prophets, when imprecating upon himself certain punishments for the commission of certain sins, includes among the punishments this one of earthly glory. He says, “O Lord my God, if I have done this; if there be iniquity in my hands; if I have rewarded evil unto him that was at peace with me; (yea, rather, I have delivered him that without cause is mine enemy;) let the enemy persecute my soul, and take it; yea, let him tread down my life upon the earth, and set my glory up on high.” And these precepts of our Lord, “Take no thought what you shall eat, or what you shall drink.
Behold the fowls of the air, or behold the ravens: for they sow not, neither do they reap; yet your heavenly Father feeds them. How much better are you than they! And why do you take thought for raiment? Consider the lilies of the field;” — these precepts, and those which follow, are not inconsistent with the promised blessings of the law, which teaches that the just “shall eat their bread to the full;” nor with that saying of Solomon, “The righteous eats to the satisfying of his soul, but the belly of the wicked shall want.” For we must consider the food promised in the law as the food of the soul, which is to satisfy not both parts of man's nature, but the soul only.
And the words of the Gospel, although probably containing a deeper meaning, may yet be taken in their more simple and obvious sense, as teaching us not to be disturbed with anxieties about our food and clothing, but, while living in plainness, and desiring only what is needful, to put our trust in the providence of God.
Source: Against Celsus (New Advent)