Mercy to you. Mercy means nearly the same as grace in the salutations of Paul. Were any one to wish for a refined distinction, it may be said that grace is properly the effect of mercy; for there is no other reason why God has embraced us in love, but that he pitied our miseries. Love may be understood as that of God towards men, as well as that of men towards one another. [1] If it be referred to God, the meaning is, that it might increase towards them, and that the assurance of divine love might be daily more confirmed in their hearts. The other meaning is, however, not unsuitable, that God would kindle and confirm in them mutual love.

Footnotes

1 - As mercy is that of God, so it is more consistent to consider "peace" and "love'' to be those of God: "may the mercy" of God, "and the peace" of God, "and the love" of God, "be increased (or multiplied) to you" -- Ed.

Mercy unto you, and peace, and love, be multiplied - This is not quite the form of salutation used by the other apostles, but it is one equally expressive of an earnest desire for their welfare. These things are mentioned as the choicest blessings which could be conferred on them: "mercy" - in the pardon of all their sins and acceptance with God; "peace" - with God, with their fellow-men, in their own consciences, and in the prospect of death; and "love" - to God, to the brethren, to all the world. What blessings are there which these do not include?

Mercy unto you - For even the best have no merit, and must receive every blessing and grace in the way of mercy.
Peace - With God and your consciences, love both to God and man, be multiplied - be unboundedly increased.

Mercy unto you, and peace and love be multiplied. In this salutation the apostle wishes for a multiplication of "mercy", from God the Father, by whom these persons were sanctified: mercy is a perfection in God; and shows itself in a special manner towards the elect, in the covenant of grace, in the provision of Christ as a Saviour, in the mission of him into this world, in redemption by him, in the forgiveness of sin, in regeneration, and in their whole salvation; and the multiplication of it intends an enlarged view and fresh application of it, which they sometimes stand in need of, as under desertions, when they want the sense and manifestation of it to them; and under temptations and afflictions, when they need sympathy and compassion; and when they fall into sin they stand in need of the fresh discoveries and application of pardoning mercy to them. Moreover, herein is wished for a multiplication of "peace" from Christ, in whom these chosen ones were preserved; and may design a fresh and enlarged view of peace being made for them by his blood, and an increase of conscience peace in their own hearts, as the effect of it; and may include peace, and an abundance of it, among themselves, as well as all prosperity, both external, internal, and eternal: likewise in the salutation, "love", and a multiplication of it is wished for from the Spirit of God, by whom they were called; and may be understood of the love with which God loved them; and which may be said to be multiplied, when it is gradually shed abroad in their hearts by the Spirit, and they are by degrees led into it more and more, and the acts of it are drawn out and set before them one after another, and fresh manifestations of it are made unto them; as in afflictive providences, after the hidings of God's face, and under temptations: and it may design the love with which they love God, which may be increased and made to abound more and more.

Mercy--in a time of wretchedness. Therefore mercy stands first; the mercy of Christ (Jde 1:21).
peace--in the Holy Ghost (Jde 1:20).
love--of God (Jde 1:21). The three answer to the divine Trinity.
be multiplied--in you and towards you.