2 Corinthians 12:10

Amongst other reasons why I rather choose to glory in what I suffer for Christ, (which is what he here calleth infirmities, and further openeth by reproaches, necessities, persecutions, and distresses for Christ's sake), this is one; that I never find myself more strong in the habits and acts of the grace that is in me, than when I am thus made weak. What the apostle here saith of himself, the people of God have ever since his time ordinarily experienced: then it is that they are made strong in the exercises of faith, and patience, and love to God. A child of God seldom walks so much in the view of God as his God, and in the view of his own sincerity, as when, as to his outward condition and circumstances in the world, he walks in the dark and seeth no light.