Jesus was a staunch believer in the oneness of God. He came to re-enforce the old commandments. He said:
"Think not that I am come to destroy the law, or the prophets; I am not come to destroy, but to fulfill. For verily I say unto you, till heaven and earth pass, one jot or tittle shall in no wise pass from the law, till all be fulfilled.
“Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the Kingdom of heaven; but whosoever shall do and teach them, the same shall be called great in the Kingdom of heaven”. (Matthew 5:17-19)
God conlmanded the Israelites, according to the Old Testament:
“I am the Lord thy God, which brought thee out of the land of Egypt, from the house of bondage. Thou shalt have none other gods before me … Thou shalt not make thee any graven image, or any likeness of any thing that is in heaven above, or that is in the earth beneath or in the waters beneath the earth”. (Deuteronomy 5:6-8)
Over and over again, the Old Testament has very explicitly and emphatically enjoined belief in one God:
“the Lord our God is one Lord”. (Deuteronomy 6:4)
If Trinity, which is so much stressed by Christianity today, had its basis on facts, it would have been explicitly stated in the Old Testament. On the contrary, the teachings of Moses urge us to believe in one God. Jesus earnestly championed for this unity of God, as the New Testament quotes:
“And Jesus answered him. The first of all the commandments is, Hear O Israel; the Lord our God is one Lord: And thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy mind, and with all thy strength. This is the first commandment”. (Mark 12:29-30)
Moreover, Jesus said:
“And behold, one came and said unto him, ‘Good Master, what good thing shall I do, that I may have eternal life?’ And he said unto him. ‘Why callest thou me good? There is none good but one, that is God, but if thou wilt enter into life, keep the commandments’”. (Matthew 19:16-17)
Thus, Jesus strongly believed in the absolute oneness of God, and enjoined others to believe in it.
**“HE DOES NOT BEGET” **
In the Bible, it is obvious that the words, “children of your Father”, have been used metaphorically.
"But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
“That ye may be the children of your Father which is in heaven; for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust”. (Matthew 5:44-45)
Jesus was not a physical son of God. The Bible refers to Jesus as the son of David:
“The book of the generation of Jesus Christ, the son of David, the son of Abraham”. (Matthew 1:1)
At another place, Jesus presented himself as the son of man:
“And Jesus saith unto him, The foxes have holes, and the birds of the air have nests; but the Son of man hath not where to lay his head”. (Matthew 8:20)
In the present day Bible, not only Jesus but also Jacob has been called the son of God. Jacob, moreover, has been referred to as “first born” son.
“And thou shalt say unto Pharaoh, Thus saith the Lord, Israel is my son, even my first born:” (Exodus 4:22)
Jesus was not a partner in the Godhead, as was not Jacob. Both of them were beloved prophets of God.
“NOR IS HE BEGOTTEN”
That Jesus was born without a father does not make him a son of God in any physical sense. Adam had neither father nor mother. The King of Salem, according to the Bible, was born without father and without mother.
“To whom also Abraham gave a tenth part of all, first being by interpretation King of righteousness, and after that also King of Salem, which is, King of peace; without father, without mother, without descent, having neither beginning of days, nor end of life; but made like unto the Son of God; abideth a priest continually”. (Hebrew 7:2-3)