This is all because in most of the cases, the look deceives. We sometimes misestimate everything
The poisonous plants, they are beautiful. However, once you touch them, they kill you smoothly. There are many attractive things in the world. The fact is that they might only seem attractive, just the cover. Nevertheless, once you have them, you realize that it was just a peel.
On the other hand, we meet people that we think that they are boring or bad. But in fact, they have a gem inside. Yes, their heart is really kind and pure. Once you talk to them, the real treasure appears.
What I want to say is, never judge a book by its cover. Do not judge people by the way they look. Get to know them, then you can decide if they are good or not. The world is full of illusive things and deceptive people.
By time, the way we used to look at something differ according to the situation and experience we get.