And why take ye thought for raiment? - Or, why are ye anxiously careful about raiment? The fourth reason against such inquietudes is the example of inanimate creatures: The herbs and flowers of the field have their being, nourishment, exquisite flavors, and beautiful hues from God himself. They are not only without anxious care, but also without care or thought of every kind. Your being, its excellence and usefulness, do not depend on your anxious concern: they spring as truly from the beneficence and continual superintendence of God, as the flowers of the field do; and were you brought into such a situation, as to be as utterly incapable of contributing to your own preservation and support as the lilies of the field are to theirs, your heavenly Father could augment your substance, and preserve your being, when for his glory and your own advantage.

Consider - Diligently consider this, καταμαθετε, lay it earnestly to heart, and let your confidence be unshaken in the God of infinite bounty and love.

why.

Matthew 6:25,31 Therefore I say to you, Take no thought for your life, what you shall eat, or what you shall drink; nor yet for your body...

Matthew 10:10 Nor money for your journey, neither two coats, neither shoes, nor yet staves: for the workman is worthy of his meat.

Luke 3:11 He answers and said to them, He that has two coats, let him impart to him that has none; and he that has meat, let him do likewise.

Luke 22:35,36 And he said to them, When I sent you without purse, and money, and shoes, lacked you any thing? And they said, Nothing...

the lilies.

Luke 12:27 Consider the lilies how they grow: they toil not, they spin not; and yet I say to you...

August 27. "Take no Thought for Your Life" (Matt. vi. 25).
"Take no thought for your life" (Matt. vi. 25). Still the Lord is using the things that are despised. The very names of Nazarene and Christian were once epithets of contempt. No man can have God's highest thought and be popular with his immediate generation. The most abused men are often most used. There are far greater calamities than to be unpopular and misunderstood. There are far worse things than to be found in the minority. Many of God's greatest blessings are lying behind the devil's scarecrows …
Rev. A. B. Simpson—Days of Heaven Upon Earth

'Forgive us Our Debts'
'Forgive us our debts, as we forgive our debtors.'--MATT. vi. 12. The sequence of the petitions in the second half of the Lord's Prayer suggests that every man who needs to pray for daily bread needs also to pray for daily forgiveness. The supplication for the supply of our bodily needs precedes the others, because it deals with a need which is fundamental indeed, but of less importance than those which prompt the subsequent petitions. God made us to need bread, we have made ourselves to need pardon. …
Alexander Maclaren—Expositions of Holy Scripture

'Lead us not into Temptation'
'And lead us not into temptation.'--MATT. vi. 13. The petition of the previous clause has to do with the past, this with the future; the one is the confession of sin, the other the supplication which comes from the consciousness of weakness. The best man needs both. Forgiveness does not break the bonds of evil by which we are held. But forgiveness increases our consciousness of weakness, and in the new desire which comes from it to walk in holiness, we are first rightly aware of the strength and …
Alexander Maclaren—Expositions of Holy Scripture