Small happiness

Lately i have been feeling very confused. What is that makes us happy .There are moments where we don't seek happiness out of our actions but it gives us immense satisfaction .Yesterday when i was coming back from the office i gave a lift to a person who was waiting for help... it was around 10 in the night .At this late its difficult to get any public commutation from infosys .When i dropped him i saw the happiness of been lucky to have got the lift this late. That expression gave me happiness which i rarely get out of other actions where i intentionally seek happiness and joy. This gave a reason why people turn philanthropist. Its this happiness and joy that they get out of the charity . They feel a sense of satisfaction for doing good without expecting anything in return.