Charles Spurgeon Commentary Luke 12:25-26

"And which of you by being anxious can add a cubit unto the measure of his life? If then ye are not able to do even that which is least, why are ye anxious concerning the rest?" — Luke 12:25-26 (ASV)

And which of you with taking thought can add to his stature one cubit? If ye then be not able to do that thing which is least, why take ye thought for the rest?

It would be a very small matter to you if you were a foot taller, or if you were a foot shorter. It is not that making yourself a cubit taller or shorter would be a small thing to do, but it is a small thing in its result; it is an inconsiderable matter whether a man is tall or short. If you, then, are not able even to reduce your stature, or to increase it, take no anxious thought about other things.