Thou talkest much of thy Father, where is he? We know no father which thou hast but the carpenter, Joseph; we do not look upon him as so credible a witness in the case, as to take his testimony in such a matter as this is. Christ tells them, that the reason why they did not know the Father, was because they did not know and acknowledge, receive and believe him; for if they had received and believed him, they would not then have been at such a loss to have known where his Father was, or who he was. The eternal Father is not to be known but in, and by, and through the Son.
Related Commentaries of John 8:19
John 8:19
19 Then said they unto him, Where is thy Father? Jesus answered,Ye neither know me, nor my Father: if ye had known me, ye should have known my Father also.