Gratitude is not only a manifestation of politeness and courtesy is one of the important laws of the Universe. Thanksgiving law means that the ingratitude or not sincere gratitude is both consequence and cause of dissatisfaction with life. This law is well described Vedic psychologist Oleg Bogachev: "When we thank, we get a luck - the flow of Goods. So it's good not to restrain and not to pollute something. If we act, and do not Express our Gratitude, luck is not for us to attend. If we radiate Thanks in advance, then you will always be in the flow of luck". Think about the meaning of the word "thank you" - at this point, we give the benefit. Verbal. Being able to thank, we become purer, cultured, we remember and are more willing to help. However it's important to thank heartily, not because it brings some good response. Unselfishness is important to have not only at the moment of impact, but in the time of thanksgiving. Вот держи не бойся всё правильно :)