St. Maximos the Confessor: To love God is to love every man

 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.
+St. Maximos the Confessor, from Four Centuries on Charity, Century 1, #13

St. Maximus the Confessor: Two kinds of fear of God

 The first [kind of fear of God] is generated in us by the threat of punishment. It is through such fear that we develop in due order self-control, patience, hope in God and dispassion; and it is from dispassion that love comes. The second kind of fear is linked with love itself and constantly produces reverence in the soul, so that is does not grow indifferent to God because of the intimate communion of its love.

+St. Maximus the Confessor, from Four Centuries on Love, first century, # 81

St. Maximos the Confessor: On love for others

 Let us love one another, and we shall be loved by God. Let us show longsuffering to each other, an God will show longsuffering towards our sins. Let us not return evil for the evil done to us (cf  Rom 12:17), and we shall not be punished according to our sins. For the forgiveness of our transgressions is to be found in our forgiveness of our brethren. And the mercy of God is to be found hidden in our compassion towards our neighbor... So you see, the Lord has given us a way in which we can be saved, and has endowed us eternally with the capacity to become children of God (cf John 1:12); thus it is on what we ourselves desire that our salvation depends.

+St. Maximos the Confessor, from Ascetic Discourse, #42.

St. Maximos the Confessor: God's dwelling in our heart

 He who has made his heart pure will not only know the inner essences of what is sequent to God and dependent on Him but, after passing through all of them, he will in some measure see God Himself, which is the supreme consummation of all blessings. When God comes to dwell in such a heart, He honors it by engraving His own letters on it through the Holy Spirit, just as He did on the Mosaic tables (cf Ex 31:18). This He does according to the degree to which the heart, through practice of the virtues and contemplation, has devoted itself to the admonition which bids us, in a mystical sense, "Be fruitful and multiply" (Gen 35:11).

A pure heart is perhaps one which has no natural propulsion towards anything in any manner whatsoever. When in its extreme simplicity such a heart has become like a writing-tablet beautifully smoothed and polished, God come to dwell in it and writes there His own laws.

+St. Maximos the Confessor, from Second Century on Theology, #80-81, in The Philokalia, Volume 2.

St. Maximos the Confessor: The relationship between prayer and love for God

 He who genuinely loves God prays entirely without distraction, and he who prays entirely without distraction loves God genuinely. But he whose mind is fixed on any worldly thing does not pray without distraction, and consequently he does not love God.
+St. Maximos the Confessor, from The Four Centuries on Charity, century 2, #1.