Look into the mirror and turn your eyes back upon yourself, and see that you do not judge the doings and sayings of others. In judging others you expend effort for nothing, often are mistaken, and easily offend. But in judging and looking into yourself you work with good results.
We often judge things, actions and speech according to our own biases and beliefs, our heart’s preferences and desires. In this we very easily loose site of true vision and judgement due to private affections and personal preferences.
There is probably a post about psychological projection and transference in there somewhere but it has not risen to the surface yet.