Trinity

Concise Bible Dictionary:

A word only used to convey the thought of a plurality of Persons in the Godhead. This was revealed at the baptism of the Lord Jesus. The Holy Spirit descended “like a dove” and abode upon Him; and God the Father declared “This is My beloved Son in whom I am well pleased.” That the Father is a distinct Person and is God is plainly stated, as in John 20:1717Jesus saith unto her, Touch me not; for I am not yet ascended to my Father: but go to my brethren, and say unto them, I ascend unto my Father, and your Father; and to my God, and your God. (John 20:17). Many passages prove that the Lord Jesus is God: one will suffice: “in His Son Jesus Christ. This is the true God, and eternal life” (1 John 5:2020And we know that the Son of God is come, and hath given us an understanding, that we may know him that is true, and we are in him that is true, even in his Son Jesus Christ. This is the true God, and eternal life. (1 John 5:20)). That the Holy Spirit is a Person and is God the following passages clearly prove (Gen. 1:22And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters. (Genesis 1:2); Matt. 4:11Then was Jesus led up of the Spirit into the wilderness to be tempted of the devil. (Matthew 4:1); John 16:1313Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will show you things to come. (John 16:13); Acts 10:1919While Peter thought on the vision, the Spirit said unto him, Behold, three men seek thee. (Acts 10:19); Acts 13:2,42As they ministered to the Lord, and fasted, the Holy Ghost said, Separate me Barnabas and Saul for the work whereunto I have called them. (Acts 13:2)
4So they, being sent forth by the Holy Ghost, departed unto Seleucia; and from thence they sailed to Cyprus. (Acts 13:4)
; Acts 20:2828Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood. (Acts 20:28); Rom. 15:3030Now I beseech you, brethren, for the Lord Jesus Christ's sake, and for the love of the Spirit, that ye strive together with me in your prayers to God for me; (Romans 15:30); 1 Cor. 2:1010But God hath revealed them unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God. (1 Corinthians 2:10)). The three Persons are also named in the formula instituted by Christ in baptism (Matt. 28:1919Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: (Matthew 28:19)). Yet there is but one God (1 Tim. 2:55For there is one God, and one mediator between God and men, the man Christ Jesus; (1 Timothy 2:5)). Satan will have an imitation of the Trinity in the Roman beast, the false prophet, and himself (Rev. 13:4,114And they worshipped the dragon which gave power unto the beast: and they worshipped the beast, saying, Who is like unto the beast? who is able to make war with him? (Revelation 13:4)
11And I beheld another beast coming up out of the earth; and he had two horns like a lamb, and he spake as a dragon. (Revelation 13:11)
; Rev. 20:1010And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever. (Revelation 20:10)).