Jamieson, Fausset and Brown on Isaiah 49:7

7. whom man despiseth--Hebrew, "the despised of soul," that is, by every soul, by all men (Is 52:14, 15; 53:3; 50:6-9; Psa 22:6). Lowth translates, "whose person is despised."

abhorreth--literally, "who is an abomination to the nation" (Lu 23:18-23). The Jews contemptuously call Him always Tolvi, "the crucified." I prefer, on account of Goi, the Hebrew term for nation being usually applied to the Gentiles, and that for people to the Jews (Ho 1:9; so the Greek terms respectively also Laos and Ethne, Ro 9:25), to take "nation" here collectively for the Gentile world, which also spurned Him (Psa 2:1-3; Ac 4:25-27).

servant of rulers--(Mt 17:27). He who would not exert His power against the rulers (Mt 26:52, 53).

shall see--namely the fulfilment of God's promises (Is 49:3, 6), "when He (shall be) a light to the Gentiles."

arise--to reverence Thee (Psa 72:10, 11; Php 2:10).

princes also--rather, for the parallelism, supply the ellipsis, thus, "Princes shall see and shall worship."

faithful--namely, to His promises.

choose thee--as God's elect (Is 42:1).