When through self-control you have straightened the crooked paths of the passions in which you deliberately indulged–that is to say, the impulses of sensual pleasure–and when, by enduring patiently the harsh and painful afflictions produced by trials and temptations suffered against your will, you have made the rough ways smooth and even, then you may expect to see God’s salvation, for you will have become pure in heart. In this state of purity, through the virtues and through holy contemplation, you will at the end of your contest behold God, in accordance with Christ’s words: ‘Blessed are the pure in heart, for they shall see God’ (Matthew 5:8). And because of the sufferings you have endured for the sake of virtue you will receive the gift of dispassion. To those who possess this gift there is nothing which reveals God more fully.
~St Maximos the Confessor