From the Haydock Commentary:
Ver. 1. Give. This fresh discourse continues to chap. lvi. 9., relating to the Messias, who is introduced speaking to all the world, Acts xiii. 47., and 2 Corinthians vi. 2. Some apply a part to Cyrus, Isaias, or John the Baptist, as to his figures. (Calmet) — The prophet has foretold the conversion of the Gentiles, as he now does, like an evangelist. (St. Jerome) — Many Jews will embrace the gospel at the end of time. (Worthington)
Ver. 2. Sword, penetrating the very soul, (Hebrews iv. 12.) and slaying the wicked, Apocalypse i. 16., and 2 Thessalonians ii. 8. Without Christ, his ministers can apply this sword to little purpose. Cyrus cut asunder the bonds of the captives by his decree. (Calmet) — Grotius improperly explains all of Isaias. (Houbigant)
Ver. 3. Glory. In the Church, God is adored in spirit and truth. Isaias is ordered thus to address the Israelites.
Ver. 4. God. He will reward the labours of his ministers, though the people be obstinate. The prophets and our Saviour frequently complain, chap. lxv. 2., and Mark ix. 18.