Life is meant to be joyful. Life is meant to be blissful. Our excitement and joy are sign posts along the spiritual path. They tell us what we need to experience next for the evolution of our souls. Follow the breadcrumbs of your joy and you will find the purpose of life.
People often get confused by the different terms for heaven, 4th density, 4th dimension, and 5th dimension but they all refer to the same thing. Heaven is something that is realized through the awakening of our own hearts, that once opened are shared with others.