Spitting against the wind

If one abuses you, there is a temptation to answer back, or to be revenged.  One should be on guard against this natural reaction.  It is like spitting against the wind, it harms no one but oneself.  It is like sweeping dust against the wind, it does not get rid of the dust but defiles oneself.   Misfortune always dogs the steps of one who gives way to the desire for revenge