She has a very good point....
When anyone (my past self included) presumes to know the will of God - be it from a sudden realization, from a passage of Scripture they read, whatever - their knowledge is tainted by their personal views, desires, experiences. So, what is the difference here between Christians and non-Christians? Non-Christians have sudden epiphanies and then tell people, "Hey! I just had a great idea! I've been thinking about this for awhile, and after a lot of research, counsel, and trouble-shooting, I now know what I should do." Christians have the same epiphany experience and tell people, "Hey! Guess what God showed me today! Yup, He definitely revealed His will to me. Praise God for showing a sinner like me what He wants for my life!"
It's not that they have a very different experience, just that one person has the guts to take responsibility for their work and ideas while the other group claims it's divinely inspired and now a holy quest. Conversely, when the non-Christian discovers he/she was wrong about the former decision/action, they can take responsibility for the mistake and change the course of action. If the Christian feels he/she was in the wrong, either they must think God had a bad idea (blasphemy!) or His once-so-clear guiding was grossly misunderstood, and if the Christian so grossly misunderstood things, well, he must be "living in sin" or something, right?
Personally, in my past, I would read through the Bible regularly, study it through outside writing about it, and pray to God every day - I wanted to know His will. As I read and prayed, I thought about everything I saw and felt, and from those experiences I drew conclusions about what was the right thing to do, and considered it to be God's will. Then later on down the road, when I realized that my original conclusion was wrong, I would feel confused (it had been so clear before, and that was what Scripture had said) and then feel a sense of guilt for being such a sinful idiot for misunderstanding things. After all, God wasn't cruel and vindictive enough to lead me on or hide His perfect will from one of His children... was He? If I sought Him earnestly and did as His Bible told me to do, was I not following Him and considered to be His child? Consider this passage:
