Thank you atau gratitude arises from one's habit of respecting others, for having done a job or giving an object.
Being grateful means a form of happiness or love for something that has been given and received with joy, so that the recipient speaks the word thank you or is grateful for what has been gained for the giver.
Word of gratitude have good values in life, by saying thank you to others, will make a person feel appreciated, and feel good about what he has done.