His word— The word of Jesus Christ; the same with his commandments in the preceding verse. The love of God is sometimes put for that love which God bears to us; but as the fear of God signifies our fear of offending the Divine Being, and the faith of Christ signifies our believing in him, so the love of God signifies that love which genuine believers bear unto God, and which all men ought to bear to that most amiable Being. See Jude, 1 John 2:21. In this latter sense the love of God is to be understood in this text. "Whosoever uprightly and impartially keepeth his word, in him certainly is the love of God perfected: it is plain he has the perfect love of God in his heart."
Related Commentaries of 1 John 2:5
1 John 2:5
5 But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.