Basil the Great
Catena Aurea · Lukasevangelium 12
Consider the lilies how they grow: they toil not, they spin not; and yet I say unto you, that Solomon in all his glory was not arrayed like one of these. If then God so clothe the grass, which is to day in the field, and to morrow is cast into the oven; how much more will he clothe you, O ye of little faith? And seek not ye what ye shall eat, or what ye shall drink, neither be ye of doubtful mind. For all these things do the nations of the world seek after: and your Father knoweth that ye have need of these things. But rather seek ye the kingdom of God; and all these things shall be added unto you.
And that you may understand an elation of this kind, remember the vanity of your own youth; if at any time while by yourself you have thought about life and promotions, passing rapidly from one dignity to another, have grasped riches, have built palaces, benefitted friends, been revenged upon enemies. Now such abstraction is sin, for to have our delights fixed upon useless things, leads away from the truth. Hence He goes on to add, For all these things do the nations of the world seek after, &c.