Never explain yourself to anyone, those who believe in you won't need it and those who don't believe in you, won't believe your explanation, anyways.
Despite knowing this, we all are anyways tempted to give explanations. We all want to be understood, we cannot help it.
How often do we let things be the way they are?
A first impression is the last impression they say. This is true if you believe in your instinct. Otherwise it makes no sense. We cannot judge people superficially. Sometimes, they are not what they seem to be. It is over a period of time that we are able to understand what they really are. We get to know them as we interact with them.