Summary
This quote suggests that things that are invisible, or unable to be perceived or understood, can easily be mistaken for things that do not exist at all. It implies that just because something cannot be seen or proven, it does not mean it is nonexistent. It serves as a reminder to not dismiss or overlook things simply because they are not immediately evident to the senses. It also highlights the importance of keeping an open mind and considering alternative possibilities beyond what can be readily observed.