
Christians believe they are "saved" by Christ. Does this mean we, I say we because I am a Christian by definition above, have somehow lost our humanity and are now perfect? Yes...OK...No and No :-), and far from it. My heart is inherently sinful by nature of being human.

So, God (Jesus) came to Earth, lived a sinless life, and was killed on the cross as a perfect and blameless sacrifice for the sins of ALL mankind. I now have been covered and my sins are forgiven. I now have Heaven to look forward to.
I believe Heaven will look like this, but way better. My job in Heaven will be to play Golf.
