Christ in answering the false teachers Stated in Mark 12;29 God is One.When did He become three? ?

I like how in Mark 12:29 Jesus confirms he is not God by saying that OUR God is one God showing that our God is also his God. Then there are the Scriptures where Jesus Christ says; I am going my way to your God and to my God to your Father and to my Father.

He didn't.  According to St. Paul, only the Father is God.  Jesus is only one of the Lords, or lesser divine beings.

Do the math: 1 X 1 X 1 = 1

The scripture is clear that Jesus is the Son of God. It doesn't say he is equal to, or a combined part of God. Jesus said he would go to be with his Father in paradise. The Holy Spirit is of the same rank. Sent to comfort mankind, there is no scriptural passage stating that the HS is a third of God. In my mind both were special purpose emissaries that represented the Father on earth, but their further relationship is unclear.

It's not really important to me, because the example of the life of The Christ is and exemplar of how we should live, and should I receive comfort from the HS, I wouldn't care if it were part of God or sent by God. Why care?

The Hebrew Scriptures are consistently clear in showing that there is but one Almighty God, the Creator of all things and the Most High, whose name is Jehovah.  Ps. 83:18

 For that reason Moses could say to the nation of Israel: “Jehovah our God is one Jehovah. And you must love Jehovah your God with all your heart and all your soul and all your vital force.” Deut. 6:4, 5

 The Christian Greek Scriptures do not contradict this teaching that had been accepted and believed for thousands of years, but instead support it. Mark 12:29; Rom. 3:29, 30

 Jesus Christ himself said, “The Father is greater than I am,” and referred to the Father as his God, “the only true God.” John 14:28

The Trinity doctrine began its slow development over a period of centuries. 

The trinitarian ideas of Greek philosophers such as Plato, who lived several centuries before Christ, gradually crept into church teachings. 

Before Plato, triads, or trinities, were common in Babylon and Egypt. 

And the efforts of churchmen to attract unbelievers in the Roman world led to the gradual incorporation of some of those ideas into Christianity. 

This eventually led to acceptance of the belief that the Son and the holy spirit were equal to the Father. 

So, what is the Trinity doctrine? It is actually a pagan doctrine masquerading as a Christian one. 

There are many scriptures that that define oneness.

Jesus  is the Creator of everything, is God almighty.

Actually, ALL POWER is given to Jesus.

The Body of Christ IS  one body with many members.

Oneness is an indication of agreement,the same belief.

God is not divided  for God is one in purpose.Jesus 

stated the Father and I are ONE,then the Jews picked 

up stones to .......!

  I don't believe in the trinity but I affirm that there are more than one God,Amen.

There is One God and He is Triune, consisting of Father, Son and Holy Spirit.  There is, has always been and forever will be only One God, Who is, has always been and forever will be Triune.

A person can better comprehend the Mystery of the Trinity by reciting daily and with care 7 Hail Marys, one each while meditating on each of the Seven Sorrows of the Virgin Mary.  Further information about this devotion is available online.

In the fourth century .....decided by man for political gain.

I will stick with the Word of God rather than the doctrine of men.

God is God 

Jesus Christ was a man born of divine conception who walked perfectly. ...He is our savior. 

Holy spirit references either God or the gift God gave at Pentecost.

It is the Trinity Doctrine of the Christian Faith. Mind, Body, and Spirit, WE are made in His image. Genesis 1:26, 27, Deuteronomy 6:4,5, and Matthew 22:37.

Father son holy ghost are all one. Embodiment of one.