Here are a few sayings from Saint Maximus that give us just a glimmer of the Saint's broad, deep thought.
Food is not evil, but gluttony is. Childbearing is not evil, but fornication is. Money is not evil, but avarice is. Glory is not evil, but vainglory is. Indeed, there is no evil in existing things, but only in their misuse.
Temptations come on some people for the cleansing of previous sins, on other for the beautification of their current perfection, and on yet others, as preparation for things to come, except temptations, which are for the increase of a man's faith and virtue, as it was with Job.
Theology without practice is the theology of demons
Do not say that faith in Christ alone can save you, for this is not possible if you do not attain love for Him, which is demonstrated by deeds. As for mere faith: "The demons also believe and tremble" (James, 2:19). The action of love consists in heartfelt good deeds toward one's neighbor, magnanimity, patience, and sober use of things.
If God suffers in the flesh when He is made man, should we not rejoice when we suffer, for we have God to share our sufferings? This shared suffering confers the kingdom on us. For he spoke truly who said, 'If we suffer with Him, then we shall also be glorified with Him' (Rom. 8:17).
For him who is perfect in love and has reached the summit of dispassion there is no difference between his own or another's, or between Christians and unbelievers, or between slave and free, or between male and female. But because he has risen above the tyranny of the passions and has fixed his attention on the single nature of man, he looks on all in the same way and shows the same disposition to all. For in him there is neither Greek nor Jew, male nor female, bond not free, but Christ who 'is all, and in all' (Col. 3:11; cf. Gal. 3:28).
The person who loves God cannot help loving every man as himself, even though he is grieved by the passions of those who are not yet purified. But when they amend their lives, his delight is indescribable and knows no bounds.
He who has not yet attained divine knowledge energized by love is proud of his spiritual progress. But he who has been granted such knowledge repeats with deep conviction the words uttered by the patriarch Abraham when he was granted the manifestation of God: 'I am dust and ashes' (Gen. 18:27).
Dispassion and humility lead to spiritual knowledge. Without them no one will see the Lord.
Christianity is an entirely new way of being human.