Albert Barnes Commentary Isaiah 50:5

"The Lord Jehovah hath opened mine ear, and I was not rebellious, neither turned away backward." — Isaiah 50:5 (ASV)

The Lord God has opened my ear — This is another expression denoting that he was attentive to the import of the divine commission .

And I was not rebellious — I willingly undertook the task of communicating the divine will to mankind. The statement here is in accordance with all that is said of the Messiah, that he was willing to come and do the will of God, and that whatever trials the work involved he was prepared to meet them .