The Buddha talked about it thousands of years ago, "Thousands of candles can be lit from a single candle, and the life of the candle will not be shortened.

佛在几千年前就谈到它，“一支蜡烛可以点燃千支蜡烛，蜡烛的生命不会被缩短。

哈佛公开课 - 幸福课课程节选