Therefore, if God so clothe the grass of the field, which today is, and tomorrow is cast into the oven, shall he not much more clothe you, O you of little faith?
All Commentaries on Matthew 6:30 Go To Matthew 6
Theophylact of Ochrid
We learn from this that we ought not to be concerned with beautifying ourselves, for our adornments wither like the fading flowers. Therefore one who beautifies himself is like grass. But you, He says, are creatures endowed with reason, whom God fashioned with both soul and body. Those "of little faith" are all those who concern themselves with such thoughts. If they had perfect faith in God, they would not give such anxious thoughts to these things.