Isaiah 55:11 - Ellicott's Commentary On The Whole Bible

So shall my word be... — The point of the comparison is that the predominance of fertility in the natural world, in spite of partial or apparent failures, is the pledge of a like triumph, in the long run, of the purposes of God for man’s good over man’s resistance. It does not exclude the partial, or even total, failure of many; it asserts that the saved are more than the lost. Comp. Isaiah 53:11.