Watchfulness is like Jacob’s ladder: God is at the top while the angels climb it. It rids us of everything bad, cuts out loose chatter, abuse, backbiting, and all other evil practices of this kind. Yet in doing this, not for an instant does it lose its own sweetness. We should zealously cultivate watchfulness, my brethren; and when - our mind purified in Christ Jesus - we are exalted by the vision it confers, we should review our sins and our former life, so that shattered and humbled at the thought of them we may never lose the help of Jesus Christ our God in the invisible battle. If because of pride, self-esteem, or self-love we are deprived of Jesus’ help, we shall lose that purity of heart through which God is known to man. For, as the Beatitude states, purity of heart is the ground for the vision of God (cf. Matt. 5:8).
An intellect that does not neglect its inner struggle will find that - along with the other blessings which come from always keeping a guard on the heart - the five bodily senses, too, are freed from all external evil influences. For while the intellect is wholly attentive to its own virtue and watchfulness and longs to enjoy holy thoughts, it does not allow itself to be plundered and carried away when vain material thoughts approach it through the senses. On the contrary, recognizing the wiliness of these thoughts, it withdraws the senses almost completely into itself.