Everyone who has any religion knows and acknowledges that people who lead a good life are saved and people who lead an evil life are damned. That is, they know and acknowledge that if we lead a good life we think good things not only about God but also about our neighbor, which is not the case if we lead an evil life.
What we love constitutes our life, and whatever we love we not only do freely but also think freely. So we say that life is doing good things because doing good things is inseparable from thinking good things. If this doing and this thinking are not working together in us, then they are not part of our life. This, though, needs to be explained in what follows.
As for the fact that religion is about how we live and that the (religious) way to live is to do good, everyone who reads the Word sees this and acknowledges it on reading it. We find the following in the Word:
Whoever breaks the least of these commandments and teaches others to do the same will be called the least in the kingdom of the heavens, but whoever does and teaches (these commandments) will be called great in the kingdom of the heavens. I tell you, unless your righteousness exceeds that of the scribes and Pharisees, you will not enter the kingdom of the Heavens. (Matthew 5:19,20)
from Life/Faith, Sections 1,2