The greatest unanswered questions of all times

These questions are't exactly unanswered but existing varied answers have failed to satisfy us which is why we're still in the quest since time immemorial. The tragedy is nothing helps.

1. Who am I? Where did I come from and where will I go?
2. What is soul? What is life? What is death?
3. What is universe? Who made it, how, when and why? How big is it and why is it so big? How does it function at all?
4. Who is God? Is he even real? 
5. What happens after death?

These questions have been explained differently in various religions and sciences but the very fact that they have different answers throws a shadow on their authenticity. Will we humans ever find answers to them?