Grace, mercy, and peace will be with us, from God the Father and from Jesus Christ, the Son of the Father, in truth and love. - 2 John 1:3
John reminds us that three qualities will be on those who follow after Christ.
The first is Grace.
Grace is the unmerited favor of God. I've heard it said that Grace is getting what you don't deserve. You don't deserve the favor or the blessing of God, and yet as His child, you walk in them. You didn't earn your salvation or your standing in Christ. They were gifts from the Father. They are evidence of His grace.
The Second is Mercy.
If Grace is getting what you don't deserve, mercy is not getting what you do deserve. the Bible says in Ephesians 2:4 that God is rich in mercy.
God's mercy sent Jesus into the world to save you from your sin. It is God's mercy that brought about the idea of salvation in the first place. If you and I got what we deserve, we should spend eternity separated from the presence of God. It is His mercy and love that opened the door for our salvation.
Finally, His Peace.
Peace is the result of God's Grace and mercy. Because of His grace and mercy, we have peace with God. The peace of God is the beginning point of all peace. Every aspect of peace in our life flows out of that peace you have with God. When your soul is at peace, every other area of your life can rest in that peace.