2 Samuel 7:8
Now therefore so shall you say to my servant David, Thus said the LORD of hosts, I took you from the sheepcote…
If a man be not signally successful in his present field he cannot reasonably hope to be more successful in a larger field. He must first fill out to his existing limits before he will be able to expand into the area of larger boundaries. A man may indeed have abilities beyond the sphere he is in at present, but in every such case the first indication of this is his filling that sphere satisfactorily. If he lacks where he is, he ought not to feel that he could do better, or even as well, if he were in a larger place. It were folly to expect that there is milk enough for a gallon measure when it cannot fill a pint pot.
Parallel VersesKJV: Now therefore so shalt thou say unto my servant David, Thus saith the LORD of hosts, I took thee from the sheepcote, from following the sheep, to be ruler over my people, over Israel: