[quote="meltzerboy, post:6, topic:278635"]
Doubting is a form of thinking, and often not a very pleasant form. It carries with it strong emotions of anguish, frustration, and worry. These emotions combined with doubting thoughts energize us to wrestle with our belief in G-d. Even if they lead us to relinquishing our belief for a time, we are often still consumed by the issue rather than adopting a neutral and apathetic stance. Witness the number of atheists on this very Forum who feel compelled to grapple with the question by means of impassioned debate. Thus our potential return to G-d is ever present in our minds, and doubt may ultimately strengthen our faith. According to Judaism, G-d not only allows Lucifer to tempt us but encourages him to do so. Lucifer takes his orders from G-d.
Obviously, we Catholics are obliged to disagree with you on that last point, but this reply is filled with much truth and wisdom. Doubt most certainly can lead one to really dig deeper into his faith and really grow in spiritual understanding. It is, as you say, a very painful process, though. But as the old saying goes, "No pain, no gain." :)