The Father, The Son, and the Holy Spirit are separate and distinct individuals. The Father is GOD presiding over the Son and the Holy Spirit who are Gods. When it is said that they are one, it is in purpose. And all of us are suppose to be "one" in God. You see that we are not one mass of being. We are expected to be one in purpose with the Father, Christ, and even the Holy Spirit. The Holy Spirit remains in spirit so that he can more effectually move through humanity with his gifts. These are the three Gods who are one together in purpose working for our behalf.
That was the best question ever asked. Why would GOD pray to himself? That doesn't make sense, does it?! He would not. For those people who read the Bible for themselves the evidence is indisputable that Christ looked to his Father for strength and answers. Yet Jesus is the God who followed Israel in the wilderness, Jehovah. He is doing his Father's will.
"There are three in heaven." The Father GOD who presides over everything including his Son, God who presides over this earth as Lord, and over the Holy Spirit God, who testifies of the Father and the Son, teaches, giving gifts through power.
Christ atoned for our sins. He, God, has suffered in the garden of Gethsemane where even his Apostles could not be available to comfort him, falling asleep, because Christ had no help. It is he alone who atoned. Even on the cross the Father withdrew for a time and Christ atoned alone. There is no other Savior, no other helper. He alone paid for sin, which he had no sin. So, he made himself sin in that he himself paid the penalty for all of us if we repent to follow his teachings.
So, God, even the Lord Jesus Christ fulfilled the mission his Father GOD sent him
into the world to do, suffer that we might not if we repent and follow him.
But if we will not repent then we must suffer even as he paying for our own sins. Which suffering caused God, the Son, the greatest of all under his Father, to tremble because of pain, and to bleed at every pore and to suffer both body and spirit, nevertheless he finished his mission and drank the bitter cup -- which was also symbolized when he asked for a little water on the cross and someone passed up vinegar.