“得道多助，失道寡助”，出自《孟子·公孙丑下》。“道”即道义、正义（morality and justice）。中国人自古推崇道义，认为道义是决定战争或事业成败的根本力量。

“得道多助，失道寡助”意思是“只有奉行道义，才能赢得内部的团结一致、赢得民心（only by upholding justice can one achieve internal unity and popular support）；否则就将不得人心，从而陷入孤立无援的境地（otherwise, popular support is lost and the ruler or leader becomes isolated and helpless）。

这句话可以翻译为“A just cause enjoys abundant support while an unjust cause finds little support”。

例句：

得道多助，你本应明白这个道理，我对你很失望。

You should have understood that a just cause enjoys abundant support. I'm very disappointed in you.