The Lord hath opened mine ear. Some understand this of the boring of the ear for perpetual service (Psalms 40:6; Exodus 21:6); but it is perhaps better to regard it as intended to mark a contrast between the true Servant and the professed servants, or children of Israel.
They "did not hear; their ear was not opened; they were treacherous and rebellious from the womb" (Isaiah 48:8). His ear was opened to receive God's word perpetually; he was not rebellious, did not turn away back.
Even when most tried, his final word was, "Not my will, but thine, be done" (Luke 22:42).