While many people of faith might not fast often enough for their spiritual health, are there times when it isn't necessary?
Where can we turn when relationships get rocky?
What about the guy who didn't make the "apostolic cut" in the Bible?
Most decisions in life result in a tradeoff - a cost vs. benefit choice. Some paths yield a lot better results than others, though.
If we were to evaluate the background of Bible authors (before they encountered God), we'd find mixed results. It is only through the evidence of God's work in their lives that their testimony is completed.
There is sometimes just more than we can understand. This is where faith must fill in the gaps.