Some people suggest that a worldview is like a set of glasses that color the way you see the world around you. A Christian interprets the world one way, and an atheist interprets the same world a completely different way since he's looking through different worldview "glasses."

Something good made something bad possible (though not inevitable). Humans, however, didn't use their freedom well. Instead of using it to honor God in friendship, they used it to rebel.

Always make it a goal to keep your conversations cordial. Sometimes that will not be possible. If a principled, charitable expression of your ideas makes someone mad, there’s little you can do about it. Jesus’ teaching made some people furious. Just make sure it’s your ideas that offend and not you, that your beliefs cause the dispute and not your behavior.

Christianity is actually "true Truth," as Francis Schaeffer used to put it. God really does exist, Heaven actually is real (along with Hell), Jesus really did live and He did the things the historical records - the Gospels - say He did, the resurrection of Christ really happened, and there really is hope each of us can count on for "the kind of perfect world our hearts have always longed for."

A worldview is simply someone's relatively organized understanding of what the world is actually like.

If the Christian doesn't get reality right, he loses effectiveness in this life. If the non-Christian doesn't get reality right, he loses much in this life, and everything and the next one. As Jesus put it, "What does it profit a man if he gains the whole world and loses his soul?"

Every worldview has its ambiguities - debatable elements that people simply will not see to eye on. There's nothing wrong with that as long as the disagreement is principled and dignified. I actually think that arguments - as opposed to quarrels - are good things because they're the best way to figure out what's true. Share your reasons, listen carefully to each other, be nice, and may the best idea win.