May mercy and peace and love be multiplied to you (Jude 2).
I don’t have fantastic insight into this verse. The only thing that crosses my mind is why Jude chooses these three words.
Paul’s nearly unwavering salutation includes the phrase “grace to you and peace,” but in the Timothy’s letters, he adds “mercy” into the mix. And in 1 Cor 13, Paul says the most important three things are faith, hope, and love, with the greatest of these being love. So I realize Jude isn’t Paul, but Jude likely would have read Paul’s stuff. Still, mercy, peace, and love are all good things.
Much like the calling, belovedness, and being guarded mentioned in the ealier verse, these three things are things that are bestowed upon us by God through the Spirit as we seek to pursue him. If we could have done these things ourselves, there would have been no need for Jesus to come. Jesus came to bring us mercy, his Gospel is peace, and he showed us the Father’s love. These things are now available liberally to us if we should choose to receive them and then live accordingly.