Just playing a little devil's advocate here: Would not being skeptical include the Bible as well? Is fear holding you back?
"Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear."~Thomas Jefferson
"Ask, and it shall be given you; seek, and ye shall find; knock, and it shall be opened unto you: <sup class="versenum">8 </sup>For every one that asketh receiveth; and he that seeketh findeth; and to him that knocketh it shall be opened."~Matthew 7:7-8 KJV
One could view it as a thing of respect to God not to question Him. But...on the other hand, sometimes the road our lives take leads us to questioning God, and that is often when He shows up. At least in my experience. I'm leaning toward that honestly seeking Him is not wrong, whereas questioning His existence simply because you don't want Him to exist, and/or out of anger, would be shakier ground.
But, this is speculation on my part.