Quote by St. Maximus the Confessor ~ on Love

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.


(St. Maximus the Confessor, Chapters on Love, 1.39-40)


Source:

http://orthodox.cn/patristics/300sayings_en.htm