Turn your attention upon yourself and beware of judging the deeds of other people, for in judging others a person labours vainly, often makes mistakes, and easily sins; whereas in judging and taking stock of ourselves we do something that is always profitable.
We frequently judge that things are as we wish them to be, for through personal feeling true perspective is easily lost.
If God were the sole object of our desire, we should not be disturbed so easily by opposition to our opinions. But often something lurks within or happens from without to draw us along with it.
Many, unawares, seek themselves in the things they do. They seem even to enjoy peace of mind when things happen according to their wish and liking, but if otherwise than they desire, they are soon disturbed and saddened. Differences of feeling and opinion often divide friends and acquaintances, even those who are religious and devout.
Thomas à Kempis (1380-1471)