Tough questions that Heaven and Hell produce

In Heaven/Hell, Theology by Anthony Knight

It is important to tackle tough questions within the Bible. Although we will never know everything, we can learn more about God if we carefully seek after Him through Scripture. We can see the nature of God as we asked the questions, what about those who never hear the Gospel, how can the people of the OT go to Heaven before Christ, and can you commit suicide and still go to Heaven if you are a true Christian?