I'd like to agree with your valuable thoughts as well especially in the idea about sharing something to others to make them happpier. In my experience, I was able to do small good deeds to others (like old beggars and street kids). The feeling is really amazing when you know you're able to share to them something good and when you see them smiling as they look at you in the eyes and softly say 'thank you'. Seeing them smile is already enough. Hearing them say 'thank you' is already a bonus. We know it's real service and a real act of kindness if we're not expecting something in return, not even a 'thank you note' from the person/s we are helping.