The evil of this world as well.
Because this world is the world of matter. A world of motion (motion) changes (change) conflict (contrast) and relative (relative), even though this is a result of the creation of a virtuous absolute (Absolute Being), but if you consider the rules. Cause and effect What are the effects (effect) must have the integrity and concentration less than what is the reason (cause) as the light of the sun, with the concentration and integrity that is less than the sun, so the existence of this world. Without the evil and misery of it, so it is impossible.
Could have cast doubt on that. In this world could not exist without evil. So why did God create the world again. It is not better or he will hold to create this world. The evil and misery were to happen?
Granted, such doubt is a doubt to think. But if we consider the absolute cause of God. We will immediately understand that the emergence of this world is necessary by necessity. That is because when that happens, then the absolute effect of it was to occur. Virtual fire to occur when fuel and other factors to make fire.
The Islamic philosophers have proposed many theories of Countrywide (al-faydh, emanation) said that all things will be shed from the primary element (First Principle) that uninterrupted. The primary element in the definition of them is God. The things that Countrywide was going to have a level of integrity that descending order. As the light from the moon. Or heat from the fire. Even away from the source of it is. The integrity and concentration, it would be even less so on the world we live in is a world where lower levels of existence.