Romans 4:1-15

I see here that we are not justified by works, but by faith. This is to say, we can not work our way into heaven. This is the difference between Christianity and other religions. It is nothing that we have done that saves us. It is merely understanding and believing what has been done for us.  We can not be "good enough" for Heaven. When we have that genuine faith, we will act on it, but it is not because of what we do that we are saved.