" When you close the door to your dwelling and are alone, you should know that there is present with you the angel whom God has appointed for each man . . . This angel, who is sleepless and cannot be deceived, is always present with you; he sees all things and is not hindered by darkness. You should know, too, that with him is God " . . .Who is everywhere present for there is no place and nothing material in which God is not , since He is greater than all things and holds all men in his hand."