It's not a question of happiness, it's a requirement. Consider the alternative.
Love is seeing without eyes, hearing without ears; hatred is nothing.
The key to heaven's gate cannot be duplicated.
Why ask why? If it's raining it just is.
Man worships because God lays His hand to the dust of our experience, and man miraculously becomes a living soul - and knows it and wants to worship.
Death is feared as birth is forgotten.