I believe the Biblical account of Jesus, who he was, why he died and all that, simply because it resonates with me and aligns with personal experiences and thoughts I had, long before ever picking up the book. Mind you, while I did grow up in a Christian household of sorts, we were not regular church goers or particularly pious. Think I'm the only one in the family ever really got into it.
Anyway, it is my beliefs regarding salvation I have trouble conveying to others. There's just no one specific thing I can point to. More a combination of thoughts, ideas and observations I've made over the years.
I guess some of it does stem from my exposure to Hindu culture and reading the Bhagavad Gita, but not entirely. When I read doctrine, I pay attention to the words, words are important, but I put more emphasis on the lesson behind the words. If that makes any sense. I think that's why Jesus taught in parables. Words get corrupted and mistranslated, but the lesson behind the words is often still there I find. In the case of the Bible though, you really have to consider it in it's entirety before the meaning of individual passages becomes clear.
I guess that doesn't really answer the question, but hopefully it will lend some insight into my mindset. Such as it is.