"It is impossible for those who have once been enlightened, who have tasted the heavenly gift, who have shared in the Holy Spirit, who have tasted the goodness of the word of God and the powers of the coming age, if they fall away, to be brought back to repentance, because[1] to their loss they are crucifying the Son of God all over again and subjecting him to public disgrace." Hebrews 4:4-6

I've experienced first-hand of friend(s) losing their faith, straying away from God, denouncing their faith. Does this contradict with this scripture? Or do we need to look into more detail as to what "enlightened", "tasted the heavenly gift", "shared in the Holy Spirt", "tasted the goodness of the word of God" really mean? What if a person was saved because they went to an evangelistical meeting, and for that one moment when they were given the opportunity to ask Christ into their lives, they felt it was right, but then later on lost that 'feeling'? Wouldn't that count as being enlightened? What about a curious person who finds truth in the Bible, doesn't that count as tasting the goodness of the word of God?

I'm going to bring this up to a pastor and post their views here later.