Think about it: the joy of the Lord doesn't just fill you with strength, it brings us all together. It's a joy that's not meant to be kept to yourself; it needs to be shared. Just like the Israelites were instructed to celebrate and share what they had with each other, you can spread the joy of the Lord with everyone you know.
This joy challenges you to love your neighbor and share the Gospel. When your heart is joyful in God, you are strong and empowered to spread that joy throughout your community. It's a lasting joy, something no one can take away.
Psalm 98:4-6 says, "Shout for joy to the Lord, all the earth, burst into jubilant song with music; make music to the Lord with the harp, with the harp and the sound of singing, with trumpets and the blast of the ram’s horn— shout for joy before the Lord, the King." You can find so many verses like this that talk about the joy of our God.