Agape: to God, or to People?

QUESTION: when the noun agape, love, is used in the epistles, without any expressed object, does it mean love to God or love to men?

ANSWER: It is generally used of love to men, especially to the brethren. We know that it is thus used in 1 Cor. 13, from the evil environments which love is said to surmount in verses 3-7. 

— Steele's Answers pp. 78, 79.