Purity of heart renews and increases the grace of God. In purity of heart all the virtues are inspired, practised, and preserved. It keeps and preserves the outer senses, it subdues and binds the animal desires within, and it is the ornament of all the inner life. It is the exclusion of the heart from things of earth and from all lies, and its inclusion among the things of heaven and all truth. And this is why Christ has said: "Blessed are the pure in heart, for they shall see God." This is the vision in which consists our eternal joy, and all our reward, and our entrance into bliss. This is why a man will be sober and moderate in everything, and will keep himself from every occasion which might tarnish the purity of his soul and body. ON THE THREE ENEMIES WHO ARE TO BE CONQUERED BY JUSTICE IF we wish to possess this virtue and to repulse these enemies, we must have justice, and we must practise it, and preserve it even until our death, in purity of heart, for we have three powerful enemies who try to attack us at all times, in all states, and in many different ways. If we make our peace with any one of them and follow him, we are vanquished, for they are in league with each other in all wickedness and injustice. These three enemies are the devil, the world, and our own flesh, which is the nearest to us, and is often the worst and most mischievous of our foes. For our animal desires are the weapons with which our enemies fight against us. Idleness, and indifference to virtue and the glory of God are the cause and occasion of war and combat. But the weakness of our natures, our negligence and ignorance of truth are the sword by which our enemies wound us and sometimes conquer us. And this is why we must be divided in ourselves. The lower part of ourselves, which is animal and contrary to the virtues, we ought to hate and persecute and cause it to suffer by means of penitence and austerities, so that it may be always crushed down and submissive to reason, and that justice, with purity of heart, may always keep the upper hand in all virtuous actions. And all the pains, sorrows, and persecutions which God makes us suffer at the hands of those who are enemies to virtue, we shall endure with joy, in honour of God and for the glory of virtue, and in the hope of obtaining and possessing justice in purity of heart; for Christ said: "Blessed are those who are persecuted for righteousness' sake, for theirs is the kingdom of heaven." For righteousness preserved in virtue and in virtuous actions is a coin of the same weight and value as the kingdom of heaven, and it is by it that we may purchase and obtain eternal life. By these virtues a man goes forth towards God and towards himself, in good conduct, virtue, and justice. ON THE KINGDOM OF THE SOUL