An important theme of all religions and schools, is the ultimate perfection and happiness of man and its outcomes. This issue has also been raised in Christianity, as one of the heavenly religions. Getting close to God and uniting with Him is the ultimate perfection of man in the Divine religions. This paper studies the final perfection of a Christian believer and its outcomes in the Bible and its commentaries, especially the official theology of the Church. The perfection and happiness of man in Christianity, which is unity with God and Christ, are granted [by God] through the atonement of Jesus, not the people themselves or their deeds. Some of the worldly and otherworldly outcomes of the Christian ultimate perfection are, lightning, succession of Christ, the authority over the affairs, receiving the Holy Spirit, and a blessed sight. Recognizing the achievements of God seekers, familiarity with the other Divine religions, realizing the dialogue between religions, and uniting the Divine religions against atheism have been considered in this research. This paper, studies the final perfection in Christianity and its outcomes through a theological approach than a mystical one.