Pride requires that an individual deal appropriately with any guilt over one's past mistakes and then move beyond that guilt. This process has been discussed in detail by psychologist Nathaniel Branden (more information) and is merely summarized here.

The first question to ask regarding guilt is whether or not it is truly deserved. Often people feel guilt about events over which they had or have no control; indeed, an individual may find it easier to feel guilty than to accept the painful fact that one is impotent in such situations. Because guilt is ultimately incapacitating, however, it is important in such cases to reestablish full awareness of one's relationship with reality and to recognize the limits to one's power, thereby resolving the guilty feelings.
Even if a person has truly done wrong, it is important to take steps to resolve the guilt. First, the individual needs to act to correct the outward effects of the error to the fullest extent possible, in particular making amends to others who may have been hurt by such actions. It is equally important for the individual to examine his or her moral character and psychological tendencies, analyzing the source of the initial error and taking steps to correct that flaw.