Complex sentence: His main theme is that each of us can reach spiritual fulfillment when we come to realize the God consciousness within us, and that our lives are meant to be harmonious, joyful, and fulfilling in all aspects.
Split into simpler sentences: His main theme is that each of us can reach spiritual fulfillment when we come to realize the God consciousness within us. Our lives are meant to be harmonious, joyful, and fulfilling in all aspects.