Have you ever given thought that whilst injustice is all around, the godless seem to prosper is not just short lived but compared to those living in God’s way are blessed! The Amplified puts it well expanding on Joy that other translations use with: happy, fortunate and to be envied!
Allow your life to be an example of life as you live out of that place of daily living in the instruction and discipline of discovering who God is! Reading his word, prayer and relationship with Christ Jesus!
Consequently you will have peace, hope in troubled times (short lived) (v13)
Be the envy of those around you that they would see what you have and want it for themselves!