Halcon: The book confirms that we have as much, or as little, depending on what God sees fit. This message is clear throughout the entire Bible.
"What God sees fit" can be literally anything. For one, standards of moral or ethical behavior are inapplicable to him. God's actions are good, just, merciful, etc because they are performed by God. Second, the Christian view is that humanity cannot redeem itself without God, and is therefore never able to earn anything better than condemnation from him. However he chooses to treat us is deserved, at best. Regardless of circumstance.
Based on these descriptions and explanations, there is no reason to expect that the afterlife will be pleasant for anyone. We cannot earn heaven. God can take it all away at any moment and without explanation. You have no reason to believe that he will treat you in a way that you would define as good, or kind, or merciful. These terms are meaningless when applied to him. It is not a matter of understanding him, either. The explanations cannot lead us to any other outcome.