Corruption of the soul is the price for understanding the world.

Each of us is born as an innocent toddler, oblivious to the world that surrounds us. Yet year after year, interaction after interaction slowly that innocence fades. We gain knowledge and understanding of the world and see it's not as pleasant as we thought.

So if corruption of the soul is the price for understanding the world, what if that's why faith is the healer of the soul since there is no understanding it. You cannot prove or disprove the presence of a higher calling for your life, but having belief is what gives you peace of mind and that teaches you that you don't need to understand everything in order to appreciate it.