My Dear Son:
Part of our ability to survive and live long on this earth is our ability to evaluate and discern whether or not we are surrounded by a safe, life-giving environment. This not only includes whether our basic needs (food, water, shelter) are met, but also whether or not we are in contact with other life forms (human, animal, etc.) that have everyone's best interests at heart.
So, one of the abilities we develop early on is the ability to judge. Some people are better at judging human disposition and motivation than others. But it all comes down to: we spend a huge section of our lives judging whether or not it is safe and/or expedient to go on within the environment we are.So spiritual masters like the Christ have been quoted as saying to judge not, to take first the log from your own eye. A common interpretation is, you cannot recognize something in another person or being unless you can first observe it in yourself. So in your judging another, you are identifying the same quality or problem in yourself.
I personally like the reversal method introduced by Eckhart Tolle. He says in summary, do not be concerned about how others may judge you. For when they judge you, they are limiting themselves. The idea is, if we hold too fast to one certain opinion about a person or circumstance, we are limiting our expectations to that judgment we formed. And who really wants to limit themselves? And yet we do it when we form a judgment and are not willing to question it, or even let it go.