ANSWER: 1, holiness; 2, service. The two are inseparable, for the first is the preparation for the second, and the second without the first is a failure. Holiness implies love, and love must find expression in the spread of the good news. Verse 16 is a proof of the first, and John 4:36 is a proof that fruit includes service. Says Wesley in his note on bearing more fruit: "Purity and fruitfulness help each other. This is one of the noblest rewards God can bestow on former acts of obedience to make us yet more holy and fit for farther and more eminent service." A decline in the spirituality of the church is always attended by a decline in its aggressiveness and converting power.
— Steele's Answers pp. 81, 82.