Before hurling insults and accusations at another, one should consider one’s own state of mind and circumstances. The tendency to lash out, defame, and belittle is an aspect of conceit. The scriptures illustrate it with the image of a person enraged, taking up a handful of excrement to fling at his or her opponent. This person befouls himself or herself even before the opponent. So, if there are matters on which we disagree, please let us all try to exercise patience and forgiveness in the spirit of the good-hearted.
–Sayadaw U Pandita, In This Very Life: The Liberation Teachings of the Buddha