Matthew 6:27 (KJV)
Which of you by taking thought can add one cubit unto his stature?

The third argument is taken from their extreme weakness and helplessness. With all your care you cannot increase your stature a single cubit. God has ordered your height. Beyond his appointment your powers are of no avail, and you can do nothing. So of raiment. He, by His providence, orders and arranges the circumstances of your life. “Beyond” that appointment of His providence, beyond his care for you, your efforts avail nothing. Seeing, then, that he alike orders your growth and the supply of your needs, how obvious is the duty of depending upon him, and of beginning all your efforts, feeling that He only can grant you the means of preserving life.