Evil is not a thing, but a choice. The problem of evil is the most serious problem in the world and the one serious objection to the existence of God. More people have abandoned their faith because of the problem of evil than for any other reason. It is a great test of how much faith one has, and also a big temptation.
There are two objections to the existence of God, the first being the ability of natural science to explain everything in experience of God. The second being the problem of evil. The question asked is if God is so good, why is his world so bad? Only humans are capable of making bad choices, and evil is a bad choice, is it not a thing. God is the only being that never screws up and is incapable of sin.
The origin of evil is not the creator but the creatures freely choosing sin and selfishness. Our conscience tells us what is right and what is wrong, we must figure that out in order to make the right choice. Disobeying the truth leads to sinning. If you don’t know your choices it’s not considered a sin if you make the wrong choice. The consequences of sinning is suffering.
The best people are the most reluctant to call themselves good. They are the most humble, they don’t stand and let everyone know, but sit quietly and do their good. It is the sinners that call themselves saints, and the saints that call themselves sinners. The people who suffer the most are the wisest, these people have stories to tell, but they don’t have all the answers. No one knows what God is up to, we don’t know his plan for us.
Hell is the consequence of free will. The occupants of hell chose to be there, but no sane person wants to go there. It is evil eternalized and the road to get to hell is easier than the road to Heaven. God is not the cause of our sins, but he is the way out of sinning if we can just realize and follow him.