What is needed...is to see God in everything, and to receive everything directly from His hands, with no intervention of second causes. And it is just to this that we must be brought, before we can know an abiding experience of entire abandonment and perfect trust. Our abandonment must be to God, not to man, and our trust must be in Him, not in any arm of flesh, or we shall fail at the first trial.
--Hannah Whitall Smith*
The soul of man is in want, and seeks for satisfaction; but becomes weary of seeking that in the world, which is not to be had in it. Yet they shall have a constant supply, where one would least expect it. I will open rivers of grace, rivers of living water...
And you shall remember the whole way that the Lord your God has led you these forty years in the wilderness, that he might humble you, testing you to know what was in your heart, whether you would keep his commandments or not. And he humbled you and let you hunger and fed you with manna, which you did not know, nor did your fathers know, that he might make you know that man does not live by bread alone, but man lives by every word that comes from the mouth of the Lord. Your clothing did not wear out on you and your foot did not swell these forty years. Know then in your heart that, as a man disciplines his son, the Lord your God disciplines you.
* Hannah Whitall Smith, The Christian's Secret to a Happy Life, chapter 8, public domain.
**Matthew Henry’s Concise Commentary on Isaiah 41, public domain