John 3:13 - Wesley's Explanatory Notes

For no one — For here you must rely on my single testimony, whereas there you have a cloud of witnesses: Hath gone up to heaven, but he that came down from heaven. Who is in heaven — Therefore he is omnipresent; else he could not be in heaven and on earth at once. This is a plain instance of what is usually termed the communication of properties between the Divine and human nature; whereby what is proper to the Divine nature is spoken concerning the human, and what is proper to the human is, as here, spoken of the Divine.