The trinity doctrine is a Catholic teaching and is wrong.
It is not taught by Christ.
John
14:28
Ye have heard how I said unto you, I go away, and come [again] unto you. If ye loved me, ye would rejoice, because I said, I go unto the Father: for my Father is greater than I.
20:17 Jesus 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.
20:30 But
these are written, that
ye might believe that Jesus is
the Christ,
the Son of God; and that believing ye might have Life through his name.
Sura
43:57. When (Jesus) the son of Mary is held up as an example, behold, thy people raise a clamour thereat (in ridicule)!
43:58. And they say, "Are our gods best, or he?" This they set forth to thee, only by way of disputation: yea, they are a contentious people.
43:59. He was no more than a servant ("I came not to do mine own will, but the Will of Him that sent me" -
John 6:38): We granted Our favour (Christ) to him (
Sura 4:171), and We made him the Example to the Children of Israel (
John 14:6).
43:60. And if it were Our Will, We could make angels from amongst you, succeeding each other on the Earth.
43:61. And (Christ the Mahdi) shall be a Sign (for the coming of) the Hour (of Judgment): therefore have no doubt about the (Hour), but follow ye Me: this is The Straight Way.
There you have it. Perfect harmony.
(Scripture quoted from the
King of kings' Bible.)