The only true God reveals himself in Scripture as the Father, the Son, and the Holy Spirit. God is one divine being or essence. At the same time God is three divine persons. Since God is three in one, we call him the Holy Trinity. This is a profound mystery far beyond our understanding.
After a person has received the gift of faith through the work of the Holy Spirit, he begins to perform good works. Good works are thoughts, words, and actions that are in accord with the will of God. The believer desires to do good works and cooperates in doing good works, but always with the help and guidance of the Holy Spirit. Good works flow from a faith that already has received full and free salvation. Good works never earn or contribute toward salvation.