What keeps so many people from enjoying life as a child does?
Can we live a life that is pure, holy, and full of joy?
I think we can, just don't listen to all the people in the world, of the secular world, that will tell you otherwise.
To be truly joyful, loving, and holy, you must become independent with your thoughts, self assured in your actions, and relentless with your faith and dedication to your own values.
And most of all, take all you advise from holy, joyful, and loving spiritual people.