The trick of selective amnesia

This is the well known human tendency to be blind to one's faults (or other unpleasant facts). If you look carefully the amnesia happens quite often and I find it both amazing and scary how efficient we are at it. The blindness is quite complete, there is no awareness of it and hence no guilt. Can you think of any good everyday examples? I can't think of any right now, will add later if I find one.