How does God use suffering to increase our faith? Let's start with what faith is: True faith implies full surrender to God. Sometimes, sad to say, the only way to get us there is through suffering.
This is a tough truth, but C. S. Lewis, at least, was willing to say that we are often asleep, or at least, deadened to God’s voice. We can become complacent. So God uses pain in our lives to rouse us.
The human spirit will not even try to surrender self-will as long as all seems to be well with it…. We can rest contentedly in our sins and in our stupidities; and anyone who as watched gluttons shoveling down the most exquisite foods as if they did no know what they were eating, will admit that we can ignore even pleasures. But pain insists upon being attended to. God whispers to us in our pleasures, speaks to us in our conscience, but shouts in our pains: It is His megaphone to rouse a deaf world.
Is God trying to get your attention through pain?