Just because you don't understand it doesn't mean it isn't so.

The line cautions against mistaking personal incomprehension for proof of falsehood. It points to a common cognitive error: assuming that what lies outside one’s knowledge, experience, or conceptual framework cannot be real or valid. In the voice often associated with Lemony Snicket’s work—wry, admonitory, and directed at young readers—it also functions as a lesson in intellectual humility: reality can be complex, and understanding may require patience, education, or a willingness to revise assumptions. More broadly, it defends the existence of difficult truths (scientific, emotional, or moral) that remain true regardless of whether an individual can immediately grasp them.