Verses 18-24. - As in chapter 1 John 2:28, St. John bursts out into personal exhortation (comp. verse 13; chapter 1 John 4:1, 7), based upon the preceding statements. He then restates the motive in a new form both positively and negatively. Verse 18. - Little children (τεκνία, the μου being spurious). This address, as in 1 John 2:28, introduces the summing up of the section. It may be doubted whether the absence of ἐν with the first pair λόγῳ μηδὲ τῇ γλώσσῃ and its presence with the second ἐν ἔργῳ καὶ ἀληθείᾳ indicates any marked difference, as if λόγῳ expressed the instrument, and ἐν ἔργῳ the element or sphere. This introduces a false antithesis, like "Do not dig with a stick, but dig in the earth." (For the Hebraic ἐν to express the instrument, comp. Revelation 13:10.) "Nor yet with the tongue" is not a tautological addition. One may love in word only, and yet the affectionate words may be quite sincere; and this is a common case. People say kind things which they mean at the moment, but afterwards they do not take the trouble to act kindly. But to love with the tongue only is far worse. This is to say kind things which one does not mean, and which one knows to be unreal. Deeds are needed to complete the kind word; truth is needed to correct the insincere tongue.

3:16-21 Here is the condescension, the miracle, the mystery of Divine love, that God would redeem the church with his own blood. Surely we should love those whom God has loved, and so loved. The Holy Spirit, grieved at selfishness, will leave the selfish heart without comfort, and full of darkness and terror. By what can it be known that a man has a true sense of the love of Christ for perishing sinners, or that the love of God has been planted in his heart by the Holy Spirit, if the love of the world and its good overcomes the feelings of compassion to a perishing brother? Every instance of this selfishness must weaken the evidences of a man's conversion; when habitual and allowed, it must decide against him. If conscience condemn us in known sin, or the neglect of known duty, God does so too. Let conscience therefore be well-informed, be heard, and diligently attended to.My little children, let us not love in word, neither in tongue,.... Which though it holds good of love to God, and to Jesus Christ, yet here is to be understood of love to the brethren, as the context shows; and so the Syriac version reads, "let us not love one another in word", &c. that is, without the heart, or with a double heart; speaking one thing with the lip, and designing another thing in the heart; speaking peaceably with the mouth, and with the heart laying wait; or we should not love in this manner "only"; and so the Arabic version of De Dieu adds. It is very lawful, and right to express our love to one another, and to all men in words, to give good words, and use courteous language, and speak in a kind, tender, and affectionate manner, and especially to persons in distress; but this should not be all, it will be of no avail to say to such, be warmed and filled, and give them nothing but these good words, nothing to warm and fill them with; see James 2:15;

but in deed and in truth; for true love is a laborious and operative grace, hence we read of the work and labour of love; it shows itself by the saints serving one another, in spirituals; as by bearing one another's burdens, forbearing with, and forgiving one another, praying for each other, and building up one another on their most holy faith; exhorting each other to the duties of religion, and not suffering sins upon one another, but admonish in love, and restore with meekness; and in temporals, distributing to the necessities of the saints, ministering: to them of their worldly substance, and supplying their daily wants: and this is loving "in deed", or "in work"; this is actual love, love in fact, and what is apparent and evident: and it is "in truth", when it is in reality, and not in show only; and when it is cordially and heartily done, with cheerfulness, and without grudging.