We've probably already talked about it in the other thread but I'll add my view (from a Christian perspective) here too.

Firstly, there is suffering in the world because God has given us free will. We can choose what we do and unfortunately some people choose to do bad things that hurt others or themselves.

Also, suffering can serve the purpose of bringing us closer to God. Suffering is inevitable in this world because we all have sinned and because of that we long to be closer to God, for Him to help us through and to receive His promise for eternal life. If there was nothing bad in the world why would we want God? What would we have to gain?

I believe that even in the hardest times those with faith in God will be able to overcome suffering. God can give us hope because we know there is more to life than what we have in this world.