What is your soul? I've thought or heard that the soul is that place inside us where the affects of all that we are or do is stored and active. Another way of putting it is that your soul is who you really are, throwing aside all pretense.
Next, let's think about salvation. I once heard a preacher or speaker say something about salvation means to bring to a wholeness or wellness.
Next, when we talk about "saving" your soul. Using the previous two examples, when we talk about salvation, we think of the person we really are, our very innermost being, coming to a wholeness or wellness. That makes so much sense to me. True salvation means that we begin being real and honest, both with ourselves and those around us. This realness is part of the path leading to our becoming truly whole and complete, to be truly "saved."
Much of Christianity today spends way too much time and effort trying to get people into heaven rather than getting heaven into them while they are here on earth. What does "getting heaven into someone" mean. It means helping them to become whole (being real, truthful, honest, living a life of integrity and honor).
Jesus said, "No one can come to me unless the Father who sent me draws him" John 6:44. Take a look at how that should affect "soul winning." If only the Father can draw people to Christ, then why is so much effort given to soul-wining by the Christian community. Only God can truly save souls (bring our innermost selves to a wholeness/wellness).