Jesus Christ
The Bible tells us that Jesus Christ is the Son of God (Jn.3:16) in whom and through whom God is revealed to us (Heb.1:1,2). He is the Word of God (Jn.1:1), the image of the invisible God (Col.1:15). He was not created or given birth to; He is not a "son" in that sense; He is eternal. He is God (Jn.1:1). He is the only Mediator between God and man (1 Tim.2:5). Whatever is finally known to us about God is known through and in Jesus Christ, because the fullness of Godhead dwells in Him bodily (Col.2:9). He is the express image of God's person, the Creator and Sustainer of the universe (Col.1:16; Heb.1:3). He is not an other God but is God and one with God (Jn.17:22) who is a Trinity. God is Father, God is Son, God is Holy Spirit. But God is not three. He is one. The three are one. How can that be? It is so because God is Truth, God is Joy, and God is Love. As Truth, God is a unity of the Knower, the Known, and the Omniscient Spirit. As Love, He is the Lover, the Beloved, and the Spirit of Love. As Joy, He is the Rejoicer, the Object of Pleasure, and the Spirit of Joy. Jesus existed before Abraham existed (Jn.8:58). Jesus existed before the creation of this universe (Jn.1:1,2). Jesus is eternal.
All things were made through Jesus and for Jesus (Col.1:16). He is the Heir of God, the Firstborn of all creation (Col.1:15). He is the Redeemer of creation, the Savior of the world, for which purpose He became man (Jn.1:14) to suffer the penalty of our sins and fulfill the righteousness of God (Heb.2:9-18). He rose from the dead and became the author of a new creation so that all who receive Him by obedience of faith are made co-heirs of the Kingdom of God. He will return again in the Last Day to judge the living and the dead (2 Tim.4:1).