  Since God gave them both the will for happiness and the will for justice, however, they had the power for self-initiated action. Whether they chose to subject their wills for happiness to the demands of justice or to ignore the demands of justice in the interest of happiness, that choice had its ultimate origin in the angels; it was not received from God. The rebel angels chose to abandon justice in an attempt to gain happiness for themselves, whereas the good angels chose to persevere in justice even if it meant less happiness. God punished the rebel angels by taking away their happiness; he rewarded the good angels by granting them all the happiness they could possibly want. For this reason, the good angels are no longer able to sin. Since there is no further happiness left for them to will, their will for happiness can no longer entice them to overstep the bounds of justice. Thus Anselm finally explains what it is that perfects free choice so that it becomes unable to sin.