Yahweh enabling his servant to hear and understand is spoken of as if Yahweh opened his ear. Alternate translation: "The Lord Yahweh has enabled me to hear and understand him" (See: [[rc://en/ta/man/translate/figs-metaphor]])
These two phrases mean basically the same thing. Disobeying what Yahweh said is spoken of as if it were turning one's back toward him. This can be stated in positive terms. Alternate translation: "I obeyed what he said" (See: [[rc://en/ta/man/translate/figs-parallelism]] and [[rc://en/ta/man/translate/figs-metaphor]])