Though he was a Son (kaiper ōn huios). Concessive participle with kaiper, regular Greek idiom as in Heb 7:5; Heb 12:17.
Yet learned obedience (emathen hupakoēn). Second aorist active indicative of manthanō. Succinct and crisp statement of the humanity of Jesus in full harmony with Luk 2:40, Luk 2:52 and with Heb 2:10.
By the things which he suffered (aph' hōn epathen). There is a play on the two verbs (emathen-epathen), paronomasia. Second aorist active indicative of paschō. He always did his Father’s will (Joh 8:29), but he grew in experience as in wisdom and stature and in the power of sympathy with us.