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.
In order to publicly administer his means of grace in his Church, the Lord has given the office of public ministry. Through the church, God calls individuals to administer the word and the sacraments on behalf of the church and in the stead of Jesus Christ.