Illness and suffering have always been among the gravest problems confronted in human life. Illness can lead to anguish, and even revolt against God. It can also become a way to conversion, an experience which helps a person discern what is not essential in his life so that he can turn toward that which is.
Christ's compassion toward the sick and his many healings of every kind of infirmity are a resplendent sign that "God has visited his people." Jesus has the power not only to heal, but also to forgive sins; he has come to heal the whole man, soul and body; he is the physician the sick need. In the sacraments, Christ continues to "touch" us to heal us.
The Anointing of the Sick is not a sacrament only for those who are at the point of death. (Please see below for the difference between the Anointing of the Sick & the Last Rites, otherwise known as Extreme Unction).
If a sick person who received this anointing recovers his health, he can receive this sacrament again in the case of another grave illness. If during the same illness the person's condition becomes more serious, the sacrament may be repeated. It is fitting to receive the Anointing of the Sick just prior to a serious operation. The same holds for the elderly whose frailty becomes more pronounced.