Hopefully making theology simpler to understand! (2 Corinthians 1:12)

A joyful heart is good medicine, but a crushed spirit dries up the bones.
Proverbs 17:22, ESV

Many things in this life and drive us down and practically kill us. Many other things can lift us up and give us joy.

The joy of the Lord is what gives us hope and makes the problems of life more nuisances (in the grand scheme).