If you look at someone through a convex lens, he will look bigger than he is, and through a concave lens he will look thinner. We sometimes act like we wear such lenses. In other words, we have a biased view towards someone and even pass judgment or condemnation on him by seeing him through so-called the lenses of prejudices. We have to get rid of them, and then we can see people with the eyes of truth, impartiality, and love. It will lead you to have peace with everyone and enjoy happiness. Matthew 7:5 says, "You hypocrite, first take the log out of your own eye, and then you will see clearly to take the speck out of your brothers eye."