A candle loses nothing by lighting another candle.
This quote is generally associated with James Keller but a quick look on the internet and you will also find it attributed to Erin Majors, Rumi and a whole bunch of other people. It is also believed to be an African or Italien proverb.
Either way, the idea is so simple. Be nice. Share your knowledge. Help. Don’t create more chaos in this world than there already is and do something with your life.