I think you are addressing the question of how we can know (recognize) Truth. "Discuss truth from where we actually live" ... to me that seems such a restricted way to look at Truth. Don't you want to know what made the big bang go bang! Nevertheless, I'm not discounting your approach, because on a daily basis I need to re-evaluate what I believe about certain situations that occur. How I behave must be directed by what I hold to be the Truth. To paraphrase your Buddhist nun - I don't want to be a Christian, I want to be Christ.