The Holy Spirit is in office on earth now—and all spiritual presence and divine communion of the Trinity with men are through Him. While the Father and the Son are visibly and personally in heaven, they are invisibly here in the Body of the Church by the indwelling of the Comforter, the Holy Spirit.
Clearly, for man to be in one place means not to be in another.  But, while this is a fact of life for us mortals, it is not true of God the Father, nor of the Son.
How reassuring it is to know that Christ is on earth now, and yet also in glory?
Yet Christ is both here and there at the same time–just as a thought which we embody in speech and send forth from the mind, yet remains in the mind as really and distinctly as before it was expressed. [A. J. Gordon, paraphrased]
“For He Himself has said, ‘I will never leave you nor forsake you.’
So we may boldly say:
‘The Lord is my helper; I will not fear. What can man do to me?’” (Hebrews 13:5 & 6)