Daily Chinese Idiom Guessing Game
To practice what one preaches; to set an example by personally taking action.
身亲身；体体验。亲身体验，努力实行。
《淮南子·氾论训》圣人以身体之。”《礼记·中庸》 力行近乎仁。”
She always talks about environmental protection, but she never actually recycles; she should learn to practice what she preaches.