The Lord GOD hath opened mine ear, and I was not rebellious, neither turned away back.
The Lord God hath opened mine ear (see note, Isaiah 42:20; Isaiah 48:8) - i:e., hath made me obediently attentive (but Maurer, 'hath informed me of my duty'), as a servant to his master (cf. Psalms 40:6-8 with Philippians 2:7; Isaiah 42:1; Isaiah 49:3; Isaiah 49:6; Isaiah 52:13; Isaiah 53:11; Matthew 20:28; Luke 22:27).
Not rebellious - but, on the contrary, most willing to do the Father's will in proclaiming and procuring salvation for man, at the cost of my own sufferings (Hebrews 10:5-10).