This book uses the ontology of Iranian Philosopher Mulla Sadra to interpret the physical world and its connection with God and Angels. In this way, this book logically answers the following basic questions about this universe and life: -Is this World a reality or just an illusion? -What is the true reality of Space and Time? -Is Space really limitless and what are the reasons for its limitlessness? -Does Time really exist or does it only appear to pass in our minds? -Is this World created by itself or by a supernatural being called God? -What is the Proof of God's existence? -Do Angels also...