We know joy when we are happy to take from life what is given. When we experience the joy of the soul and higher states of consciousness, this joy is the essence of completion and fulfillment. There is nothing that can add to it or take away from it. Joy is our natural state.
Once a reporter asked Einstein, "What is the most important question in the world?" He replied, "The most important question in the world is, do you want a peaceful, happy, abundant world in which to live, or do you want a foreboding, fearful, and scarce world?"
The reporter slightly puzzled, asked, "Why is this the most important question in the world?"
Einstein replied, "Because whatever you choose, you will create."