John 8:28,29 - Joseph Benson’s Commentary on the Old and New Testaments

Then said Jesus, When ye have lifted up the Son of man From the earth on the cross; and have proceeded so far as to put him to a violent death, then, instead of seeing his cause and interest overborne by that outrageous attempt, shall ye know By some new and convincing tokens; that I am he This, doubtless, refers to the prodigies attending his death, his resurrection, and ascension, the effusion of the Holy Spirit upon his disciples, the amazing miracles wrought by the apostles in his name, and the wonderful success which he should give to the gospel through their ministry; and that I do nothing of myself Nothing by my own authority, separate from that of my Father; but as my Father hath taught me, I speak I teach such doctrines only as he has commissioned me to declare; and he that sent me is with me Besides, my Father is always with me to bear his testimony to the truth of what I say, and to support and vindicate me. The Father hath not left me alone Never from the moment I came into the world, nor will he ever leave me; for I do always those things that please him I always act agreeably to his will, and faithfully and constantly pursue the important work which he has committed to my trust.