Maybe I never was a Christian?

[Mystic]

And how do you determine which morals/ethics are "better"?

I don't know how it's done, it's all very mysterious, morality is. Before I use to follow ethics from authority, so this thinking for yourself and realizing ethics outside of authority, is new to me. Although I questioned scholars, it was always backed up by authority of Quran when I did.
Obviously if I had 100% infallible method, I would have 100% absolute morality, which I don't believe I have. It's combination of reflection of key principles we believe in and I always believed, and applying those principles, as well in some instances, nothing but pure instinct (trusting the subconcious knowing why and sort feeling why while I don't know how to articulate it).

And you have some way of recognizing this "light"?

Yeah sure.