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 exist? And how?• How did God and Angels create this World?• Do God and Angels affect the daily events of this world? and how? • Where are God and Angels located?• Why man cannot see God and Angels?• What is the Purpose of the World’s Creation?• Does Man have a free will? And is God the source of evils in this World?• Will this World continue to exist for ever? • What will happen after the end of this World?The uniqueness of the book lies in the fact that it is the one single book which gives the answers of all such interesting questions in a manner which is strictly logical as well as simple to understand even for general inquisitive readers. In addition to general readers, this book is also of much interest to the specialists in the fields of cosmology, philosophy, religion, ontology, cosmogony etc. In this way, the circle of its target readers is very wide. This book is also useful to understand the philosophy of Mulla Sadra an Iranian philosopher of seventeenth century whose most of the books and writings are not yet translated into European languages and are thus not yet fully known to the western readers.