God Willed for Evil to Exist, but He Didn't Create It

According to mc arthur, god willed for evil to exist, but he didn't create it. From where does it find its origin? If not the free will of creatures? Does mc arthur answer this question for us? Glad to know that i'm not here to be the first person to give you the answer. How about the westminster confession? Listen to this, god from all eternity did by the most wise and holy counsel of his own will, freely and unchangeably ordain whatsoever comes to pass. Yet so as thereby, neither is god the author of sin, nor is violence offered to the will of the creatures, nor is the liberty or contingency of second hand