Whatever a man loves he ...

Whatever a man loves he inevitably clings to, and in order not to lose it he rejects everything that keeps him from it. So he who loves God cultivates pure prayer, driving out every passion that keeps him from it. He who drives out self-love, the mother of the passions, will with God's help easily rid himself of the rest, such as anger, irritation, rancor and so on. But he who is dominated by self-love is overpowered by the other passions, even against his will. Self-love is the passion of attachment to the body.
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 Maximus the Confessor

Quotes from the same author

If everything that exists was made by God and for God, and God is superior to the things made by Him, he who abandons what is superior and devotes Himself to what is inferior shows that he values things made by God more than God Himself.
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 Maximus the Confessor
He who asks to receive his daily bread does not automatically receive it in its fullness as it is in itself: he receives it according to his own capacity as recipient. The Bread of Life (cf. Jn. 6:35) gives Himself in His love to all who ask, but not in the same way to all; for He gives Himself more fully to those who have performed great acts of righteousness, and in smaller measure to those who have not achieved so much. He gives Himself to each person according to that person's spiritual ability to receive Him.
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 Maximus the Confessor
In all our actions, God considers the intention: whether we act for Him or for some other motive.
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 Maximus the Confessor
... for our sake loosing within Himself the bonds of bodily birth, He granted us through spiritual birth, according to our own volition, power to become children of God instead of children of flesh and blood if we have faith in His Name (cf. Jn. 1:12-13). For the Savior the sequence was, first of all, incarnation and bodily birth for my sake; and so thereupon the birth in the Spirit through baptism, originally spurned by Adam, for the sake of my salvation and restoration by grace, or, to describe it even more vividly, my very remaking.
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 Maximus the Confessor
You will be able to check envy if you rejoice with the man whom you envy whenever he rejoices, and grieve whenever he grieves.
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 Maximus the Confessor