If God uses sinful people to his own ends, why doesn't he just make them righteous?
God would like all people to choose righteousness, but they do not have to.
Do I have a soul? If so where is it and what does it do?
The soul is our ability to choose righteousness. IMO God gives us Himself in that we have a soul. From the "after-life" thread, I would say the soul is the will. It is free in that we can choose to follow it or not.
Under the Paul standard, isn't it possible for each man and woman could have their own husband or wife? You could have some men who had more than one wife and some women that had more than one husband. Everyone gets a husband or wife.
As for using sinful people, God should seemed to use polygamists to a high degree. The wisest man in the world had hundreds of wives and we are told over and over in the Bible to seek wisdom. Is it not wise to follow the example of the wisest man in the world?
IMO the wisest man caused the kingdom to be split, so even wisdom will not work unless you use it. Wisdom comes from the Word and allows the soul to make the right choices and live a righteous life. The human nature passed down through our human DNA would prefer to do it's own thing. If you think it wise to have a thousand wives, then more power to you.
Other then live on after death, what does the soul do?
What is doing during normal life?
If I don't bring one with me to hell, then what of me goes to hell? And where does my soul go?
The soul that is made sin shall die or seperated eternally from God.
Let's keep it simple then. Is there more to us than physical body + soul?
Peter said that the things that Paul said was hard to comprehend. Peter was called by Jesus to lead His "church". Now Peter was an unlearned fisherman who Jesus named the rock. Peter was given the Wisdom of God which empowered Him to be a great leader, but Paul had an education, and with his knowledge he had insight from God that not even Peter was privy to.
We each possess in us a personality that makes us different. It is the nature that is bent to choose wrong. We have a body that consists of the material and holds the brain which allows us to reason. The brain is the point at which the soul and spirit interact. Thus we are different from the animal in that we have both soul and spirit to choose freely to follow our creater or choose our own path. Predestination comes from the fact that God works in all of our lives if we "will" it. We are not forced to do that which we are predestined, but by God's mercy we are allowed to choose it. Thus God works in all of us. It has been explained that even through the hardness of one's heart, there is mercy, not that we as humans can comprehend, but that we have a purpose even though we choose damnation.