John Chrysostom (attributed)

What they thought in their hearts, that they spoke by their deeds. Christ lays bare here the natural habit of all wicked men; each readily apprehends the other’s fault, but none his own; for in another’s case each man has an unprejudiced heart, but in his own case it is distorted. Therefore in the cause of others we can all easily be righteous judges. He only is the truly righteous and wise who is able to judge himself. It follows, Wherefore ye be witnesses unto yourselves, that you are the children of them which killed the Prophets.