"It's what a fellow thinks he knows that hurts him"

This quote by Kin Hubbard talks to the concept that it is not always what we know that can hurt us, however rather what we think we know. This can be interpreted in a few different methods. To start with, it could be referring to the concept that when we believe we understand something, we may be most likely to act on it without considering the consequences. This can lead to us making mistakes or taking threats that we wouldn't have taken if we had made the effort to think things through. Second of all, it might be describing the idea that when we believe we understand something, we may be more likely to be overconfident in our beliefs and opinions. This can lead to us being too sure of ourselves and not being open to other point of views or concepts. Ultimately, this quote is a reminder to be mindful of what we think we know and to be available to originalities and perspectives.