More often than not, it is what you are rather than what you say that will bring an unbeliever to Christ. This, then, is the ultimate apologetic. For… - William Lane Craig

Heaven may not be a possible world when you take it in isolation by itself. It may be that the only way in which God could actualize a heaven of free creatures all worshiping Him and not falling into sin would be by having, so to speak, this run-up to it, this advance life during which there is a veil of decision-making in which some people choose for God and some people against God. Otherwise you don't know that heaven is an actualizable world. You have no way of knowing that possibility.

Moreover, if we believe, as I do, that God's grace is extended to those who die in infancy or as small children, the death of these children was actually their salvation. We are so wedded to an earthly, naturalistic perspective that we forget that those who die are happy to quit this earth for heaven's incomparable joy. Therefore, God does these children no wrong in taking their lives.
So whom does God wrong in commanding the destruction of the Canaanites? Not the Canaanite adults, for they were corrupt and deserving of judgment. Not the children, for they inherit eternal life. So who is wronged? Ironically, I think the most difficult part of this whole debate is the apparent wrong done to the Israeli soldiers themselves. Can you imagine what it would be like to have to break into some house and kill a terrified woman and her children? The brutalising effect on these Israeli soldiers is disturbing.

The atheist believes the (Schlitz) beer commercial, which tells us to “Go for the gusto since we only go around once!” Now, I submit that’s a patently false view of ethics. If there is no God then Mr. Zindler is absolutely right—just live for total self-interest. There is no objective right and wrong. Nobody holds you accountable so just go for all the gusto you can get. Now, of course, you have to be rather careful about this because if you just pursue your unbridled lusts you may hurt other people and they, in turn, may try to get you back and diminish your gusto.