Spiritual joy is a lasting joy, a joy based on Spiritual things and our promise of eternal life in heaven. Children of promise, find joy in the Lord.
As we mature naturally and spiritually we learn to not let the small things cause us to fall apart. I find it may take a moment to collect my thoughts and pull it together but the Spirit helps to bring that joyful laughter at the thought that something tried to take my joy. Yes, I have learned to laugh and rejoice when faced with the cares of this world that before would have caused a negative response.