What is the sanctified unity together with God our Lord Jesus Christ of Nazareth?

Shown in these verses:

John 17:16-26 KJV

[16] They are not of the world, even as I am not of the world.

[17] Sanctify them through thy truth: thy word is truth.

[18] As thou hast sent me into the world, even so have I also sent them into the world. [19] And for their sakes I sanctify myself, that they also might be sanctified through the truth. [20] Neither pray I for these alone, but for them also which shall believe on me through their word;

[21] That they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us: that the world may believe that thou hast sent me. [22] And the glory which thou gavest me I have given them; that they may be one, even as we are one:

[23] I in them, and thou in me, that they may be made perfect in one; and that the world may know that thou hast sent me, and hast loved them, as thou hast loved me.

[24] Father, I will that they also, whom thou hast given me, be with me where I am; that they may behold my glory, which thou hast given me: for thou lovedst me before the foundation of the world. [25] O righteous Father, the world hath not known thee: but I have known thee, and these have known that thou hast sent me. [26] And I have declared unto them thy name, and will declare it : that the love wherewith thou hast loved me may be in them, and I in them.