Doesn't it depend on the purpose of your life? I have written about this at my web site (in profile, nothing for sale, no stylistic ambition). You can email me if you can't find it in there.

For me, it is to have joy, by glorifying God through learning and service to others. And he gives us all, in return. We all have to choose.

(I agree; it is a hard problem.)

(Thoughtful comments appreciated with any downvotes.)