Imagine there is a heaven, and a hell below. Imagine there is a God who created this world, a perfect world - and he created each of us and gave us this world to enjoy. But we decided we didn't need him and we knew better. But our way wasn't better. It led to emptiness and despair and we messed up this perfect world and along with it, our lives went astray.
But in his infinite love for us, God looked at his only son, who he loved dearly, and he told him to leave the perfection and glory of heaven and come into this crooked and depraved world - knowing full well he would be mistreated, mocked and murdered. God knew that despite the horrible way he would be treated, Jesus would lead a perfect, sinless life and by doing that , he could stand in place for us and accept the penalty for all we had done wrong.
Now, all we need to do is accept that gift and God will forgive us and allow us to enjoy the glory of eternal life in heaven. But if we still think we know better, God cannot know us and we will be forever separated from him and unable to save ourselves from a judgement that is coming that will result in suffering and pain beyond that which we can imagine.
You may say I'm a dreamer, but I believe in the Son. I hope today you will join me and forever we'll live in the kingdom that is to come.