To pc,
In Hebrews it says, "God, who long ago at many times and in many ways spoke to our forefathers by means of the prophets, has at the end of these days spoken to us by means of a Son, whom he has appointed heir of all things and through whom he has made the system of things." (Hebrews 1:1, 2)
The next verses are a "revelation" (disclosure/uncovering) of who Jesus Christ is:
"He is the 'beaming forth from' of his glory and the image IMPRINTED by his very substance, and he sustains all things by the word of his power; and after he had made purification for our sins he sat down at the right hand of the Greatness in lofty places. So he has become so much better than the angels, to the extent that he has inherited a name more excellent than theirs." (Hebrews 1:3, 4, see NWT footnotes)
The Son is the 'beaming forth from' of his glory. This means the very glory (worship) of our Father comes FROM him. It beams forth from HIS body. He is also the image of God, but not only that, but he has been imprinted by his actual SUBSTANCE. This means the very substance/nature of the Father that no other creature in heaven has, is imprinted in the Son. Therefore, the Son is the EXACT image of the Father and speaking or referring to the Son is the SAME as referring to the Father. The Son is not the Father, but shares the unique 'nature' of the Father. Thus, what no one can snatch out of the hand of the Father, no one can snatch out of the hand of the Son. The Father and the Son are one.
The Son, as a spirit, can enter into the body of the Father and become 'one' with the Father. Anyone else who wishes to come to the Father, cannot come to him unless it is through the Son (John 14:6).