Because Isaiah prophecies of the coming divinity of Jesus Christ, Abinadi continues to quote Isaiah as part of his testimony. In Mosiah 14, we learn that the Savior, Jesus Christ was to be (is) meek and humbly (Mosiah 14:2). The people would (did) reject Him Mosiah 14:3. He would (does) carry our griefs and sorrows (Mosiah 14:4). He would (did) take upon Himself the sins of all people (Mosiah 14:5–6, 8, 10–12). He would (did) willingly subjected Himself to persecution and death (Mosiah 14:7–9). He was (is) without sin (Mosiah 14:9).
Abinadi taught that the Savior “satisfied the demands of justice” Mosiah 15:9. Because we are all sinners, somehow these sins must be paid for. Jesus satisfied this demand for those who will accept Him and His Atonement as well as repent of their sins. To satisfy the demands of justice, the Savior bled and died for us.