CCC 1502 The man of the Old Testament lives his sickness in the presence of God. It is before God that he laments his illness, and it is of God, Master of life and death, that he implores healing.1 Illness becomes a way to conversion; God’s forgiveness initiates the healing.2 It is the experience of Israel that illness is mysteriously linked to sin and evil, and that faithfulness to God according to his law restores life: “For I am the Lord, your healer.”3 The prophet intuits that suffering can also have a redemptive meaning for the sins of others.4 Finally Isaiah announces that God will usher in a time for Zion when he will pardon every offense and heal every illness.5

1 Cf. Pss 6:3; 38; Isa 38.
2 Cf. Pss 32:5; 38:5; 39:9, 12; 107:20; cf. Mk 2:5-12.
3 Ex 15:26.
4 Cf. Isa 53:11.
5 Cf. Isa 33:24.