Which of you by {l} taking thought can add one cubit unto his stature?

(l) He speaks of care which is joined with thought of mind, and has for the most part distrust yoked with it.

People's New Testament

6:27 Which of you by being anxious, etc. There can hardly be a doubt that this ought to be rendered, add one cubit to his age, or period of life. The idea is: What is the use of anxiety? Who, by his anxiety, can add anything to life's journey ? If it is proper to speak of 'length' of life, it is also appropriate to speaking of adding a cubit to its length.

Wesley's Notes

6:27 And which of you - If you are ever so careful, can even add a moment to your own life thereby? This seems to be far the most easy and natural sense of the words.

Jamieson-Fausset-Brown Bible Commentary

27. Which of you, by taking thought-anxious solicitude.

can add one cubit unto his stature?-"Stature" can hardly be the thing intended here: first, because the subject is the prolongation of life, by the supply of its necessaries of food and clothing: and next, because no one would dream of adding a cubit-or a foot and a half-to his stature, while in the corresponding passage in Luke (Lu 12:25, 26) the thing intended is represented as "that thing which is least." But if we take the word in its primary sense of "age" (for "stature" is but a secondary sense) the idea will be this, "Which of you, however anxiously you vex yourselves about it, can add so much as a step to the length of your life's journey?" To compare the length of life to measures of this nature is not foreign to the language of Scripture (compare Ps 39:5; 2Ti 4:7, &c.). So understood, the meaning is clear and the connection natural. In this the best critics now agree.

Matthew Henry's Concise Commentary

6:25-34 There is scarcely any sin against which our Lord Jesus more warns his disciples, than disquieting, distracting, distrustful cares about the things of this life. This often insnares the poor as much as the love of wealth does the rich. But there is a carefulness about temporal things which is a duty, though we must not carry these lawful cares too far. Take no thought for your life. Not about the length of it; but refer it to God to lengthen or shorten it as he pleases; our times are in his hand, and they are in a good hand. Not about the comforts of this life; but leave it to God to make it bitter or sweet as he pleases. Food and raiment God has promised, therefore we may expect them. Take no thought for the morrow, for the time to come. Be not anxious for the future, how you shall live next year, or when you are old, or what you shall leave behind you. As we must not boast of tomorrow, so we must not care for to-morrow, or the events of it. God has given us life, and has given us the body. And what can he not do for us, who did that? If we take care about our souls and for eternity, which are more than the body and its life, we may leave it to God to provide for us food and raiment, which are less. Improve this as an encouragement to trust in God. We must reconcile ourselves to our worldly estate, as we do to our stature. We cannot alter the disposals of Providence, therefore we must submit and resign ourselves to them. Thoughtfulness for our souls is the best cure of thoughtfulness for the world. Seek first the kingdom of God, and make religion your business: say not that this is the way to starve; no, it is the way to be well provided for, even in this world. The conclusion of the whole matter is, that it is the will and command of the Lord Jesus, that by daily prayers we may get strength to bear us up under our daily troubles, and to arm us against the temptations that attend them, and then let none of these things move us. Happy are those who take the Lord for their God, and make full proof of it by trusting themselves wholly to his wise disposal. Let thy Spirit convince us of sin in the want of this disposition, and take away the worldliness of our hearts.