Beware the mindset of understanding especially when it comes to living things.
Belief that you understand something inherently carries judgment and assumptions about that thing, be it factual or a personal projection based on other data derived from non-correlated sources. It is exceedingly rare to find one that does not begin to judge what they think they understand.
Fear and Judgment of something that you do not understand is limiting and sometimes dangerous, but Judgment of that which you understand can be even more so.
Erroneous assumption builds upon itself and without correction can oscillate and eventually damage or destroy its own source.
Judgment locks you into a pattern of thinking that can limit your ability to deal with the sometimes shocking manner in which the Universe can toss the dice.
Acceptance of incomplete understanding is often the best way to approach the Universe. It helps you to understand things much more thoroughly.