The objective of asceticism is to leave all that harms the servants Hereafter and the objective of worship is to do all that will benefit his Hereaft… - Ibn Taymiyyah

God does not create pure evil. Rather, in everything that He creates is a wise purpose by virtue of what is good. However, there may be some evil in it for some people, and this is partial, relative evil. As for total evil or absolute evil, the Lord is exonerated of that.

The more the servant loves his Master, the less will he love other objects and they will decrease in number The less the servant loves his Master, the more will he love other objects and they will increase in number.

This whole religion (of Islam) revolves around knowing the truth and acting by it, and action must be accompanied by patience.