Thy father — This may be put for their forefathers; and so he tells them, that as they were sinners, so also were their progenitors, yea even the best of them. Teachers — Thy priests and prophets; who were their intercessors with God: and if these were transgressors, the people had no reason to fancy themselves innocent.
Related Commentaries of Isaiah 43:27
Isaiah 43:27
27 Thy first father hath sinned, and thy teachersf have transgressed against me.