Shared ground
The passage presents a speaker who describes his role as received, not self-made: “the Lord Yahweh” gives him a trained tongue and repeatedly trains his hearing (explicit in the text). His speech is aimed at a concrete need—supporting “the weary” with timely words—so his teaching is not merely informational but sustaining (explicit).
The speaker’s ability to speak well is tied to a pattern of listening: “morning by morning” God awakens him so he can hear “as those who are taught” (explicit). The passage also links God’s action (“opened my ear”) with the speaker’s response (“I was not rebellious… neither turned away backward”), presenting obedience as steady, forward-facing fidelity (explicit).
Where interpretation differs (only where needed)
Who the “I” is. Some read the speaker as Isaiah (or another prophet) describing prophetic training for a difficult mission. Others read the speaker as an ideal servant figure within Isaiah’s message, speaking for the faithful messenger God provides. Many Christian readers also connect the language to Jesus because the next verses describe non-retaliation under abuse and confidence in God’s help (a wider-context connection rather than something Isaiah 50:4–5 states directly).
What “opened my ear” means. Some take it mainly as God enabling understanding and receptivity. Others hear commissioning language: God authorizes the speaker for a task and the “opened ear” marks his readiness to receive orders. Either way, the text’s emphasis is that obedience follows receptive listening.
Why the disagreement exists
The lines are first-person and richly poetic, but they do not name the speaker. The surrounding section (Isaiah 50:1–9) combines themes that fit multiple candidates: prophetic calling, an exemplary servant, and a suffering yet confident messenger. Also, expressions like “opened my ear” and “morning by morning” can be read either as imagery for ongoing formation or as a description of a concrete daily routine.
What this passage clearly contributes
It contributes a tight connection between trained speech and trained listening: words that sustain the weary come from repeated instruction, not mere impulse or personal talent. It also frames obedience as the opposite of rebellion and retreat, grounded in God’s prior action of awakening and opening the ear. In context, these verses function as the foundation for the speaker’s later endurance under opposition (Isaiah 50:6–9). See also Isaiah 50:6–9.