Psalm 85:10 Mercy and truth have met together; Righteousness and peace have kissed.
The mercy of God has been shown to us through the Gospel and through the scriptures, the truth. They have come together and we are blessed because of what has been done for us in the past.
Just as two people who have not seen each other for a while will hug and kiss when they meet, so too does the peace of God when we follow His righteousness.
Upholding God’s law and will gives us more peace than any kiss can from a greeting, but it is these “pictures” that allow us to see the meaning of God’s Word as well.