It is the heart (soul) we must understand to find out why we suffer or have joy in our lives. The following is from the Ofudesaki, the most sacred scripture in the world.
This path, if you truly think about it.
What your hearts brings forth, all ponder. Ofudesaki 2-15
God is telling us the heart brings forth our fate. It is not God that does this. What is the heart? More evidence to come!