Just as the thought of fire does not warm the body, so faith without love does not actualize the light of spiritual knowledge in the soul.
Maximus the ConfessorMore Maximus the Confessor quotes
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.
Maximus the Confessor
But I say to you, the Lord says, love your enemies, do good to those who hate you, pray for those who persecute you. Why did he command these things? So that he might free you from hatred, sadness, anger and grudges, and might grant you the greatest possession of all, perfect love, which is impossible to possess except by the one who loves all equally in imitation of God.
Maximus the Confessor
