A persons actions can fool us unless we have diverse experiences in life. If a person is boisterous we might think they are obnoxious, perhaps they are, but it is possible they might actually be nice. We might see a beautiful person who is shy and reserved, perhaps they are, but we could become content and be unaware of deceitful behavior which was used to exploit us. If we contact people with a closed mind, with little experience of a diverse life, and in a disrespectful or aggressive manner, they are likely to be very defensive and we may not realize the good traits within them.
The world is full of people who present them self exactly as they are, what you see is what you get. However the world is also full of deceitful people who mask their true self, what you see is not what you get.
We have a lot in common with animals, we use different tactics for our survival based on the outcome we want. Animals use many skills to deceive, such as camouflage, threatening vocal behavior, or a threatening pose. Humans are no different, they also pose many things through deception in order to leverage them self. Folks may proclaim lifelong bonds with friends if it benefits them, yet never return. People may guarantee many things, when actually they are looking for a way to take advantage of a situation.
Diverse experiences in life helps to clearly understand actions regardless of deceit. Always put yourself in the most beneficial position around others, or at least stay on equal ground. Be yourself, protect yourself, and see through the veil. Our experience in life is valuable to overcome the imposters who seek to deceive and take advantage of weakness or in some cases goodness. Live wisely, evaluate actions before choosing words, and know who you are dealing with.