The Buddha considered gratitude to be a great virtue. Yes, it is true that this virtue is rare in any society. You cannot always expect other people to be grateful to you for what you have done. People are inclined to be forgetful especially when it comes to remembering past favours. If people fail to show gratitude, you have to learn accept them as such – only then can you avoid disappointment. You can be happy regardless of whether people arẹ grateful for your kindness and help; you need only think and feel satisfied that you have done your noble duty as a human being to your fellow men. ~by Venerable Dr. K. Sri Dhammananda