In this third and final section, we will complete the long journey we have undertaken and try to sketch out a new theory, or rather a renewed theory, which considers the critical points that have emerged during our study. After analysing the various theories of salvation and expounding some theological foundations in the first two sections, in this last section we will try to shed light on the nature of God, as we will discover how this nature is intimately linked to the work of salvation. We will show that God is not divided in himself, as some theories have portrayed, but has always worked in complete communion and harmony from all eternity, in merciful love for his creatures, to make them sons and daughters, partakers of his perfect nature, and to share with them the joy of eternal life.