why should we say "thank you"--- are we not selfish

India
February 4, 2007 11:28am CST
When a person helps us or if someone says something good about us or for that matter anything that benefits us we say thank you, but if someone does something bad to us we have a grudge and not say thank you. so we are just selfish na...Or can we take it as just a good manner.
No responses