THE FATHER AND THE SON ARE ONE

So Jesus said to them, “Truly, truly, I say to you, the Son can do nothing of his own accord, but only what he sees the Father doing. For whatever the Father does, that the Son does likewise (John 5:19).
This is NOT a statement of humility, though Jesus certainly demonstrated humility; nor of inadequacy. This is a statement of equality with the Father; a statement of oneness and unity with God.
Leon Morris says this: “It is not simply that he does not act in independence of the Father; he cannot act in independence of the Father… the things the Father does, that the Son does too, not in imitation, but in virtue of his sameness of nature” (Leon Morris, The Gospel According to John, page 277).
There is never a conflict between the Father and the Son. They exist in perfect harmony. There are not two wills in which each yields to the other but their wills are in perfect unity because they are one. One’s will is the other’s will.
John Piper uses this phrase: “they act in perfect synchronization.”
The unity of the Father and Son is such that what the Father does the Son IS doing as well because they are one and do not act independently of each other. In other words, as S. Lewis Johnson put it in a sermon on this text, "the Father and the Son are not simply one in will, but one in essence."