动之以情 move with emotion
Explanation
用真挚的感情去打动对方，使其有所触动，从而接受自己的意见或建议。
To move the other party with sincere emotions, so that they are touched and thus accept their own opinions or suggestions.
Origin Story
从前，在一个小山村里住着一对老夫妇，他们有一个不争气的儿子，整天游手好闲，不务正业。老夫妇多次劝说儿子，希望他能改过自新，但儿子始终不听，这让老夫妇心急如焚。一天，老母亲想起儿子小时候，她含辛茹苦地把他拉扯大，付出了多少的心血和汗水，想到这些往事，她忍不住老泪纵横。她把儿子叫到跟前，语重心长地说：‘孩子啊，你看母亲为你付出了这么多，你怎么能这么不争气呢？’说着，老母亲就哭了起来，老父亲也跟着流下了眼泪。看到父母如此伤心，儿子心里很不是滋味，他终于明白了父母的苦心，于是他痛哭流涕地向父母认错，并保证以后一定会改过自新。从此以后，儿子真的变了，他努力工作，孝顺父母，成为了一个对社会有用的人。
Once upon a time, there lived an elderly couple in a small mountain village. They had a good-for-nothing son who idled his days away. The elderly couple repeatedly tried to persuade their son to change his ways, but he would not listen, leaving them heartbroken. One day, the old mother recalled her hardships raising her son, all the sacrifices and tears shed. Overwhelmed with emotion, she called her son and said, “Son, look at all I've done for you. How can you be so unmotivated?” Tears flowed freely, and the father too was moved to tears. Seeing his parents so heartbroken, the son finally understood their sacrifices. Overcome with remorse, he wept and promised to change his ways. True to his words, he turned his life around, worked diligently, and became a contributing member of society.
Usage
用于劝说他人，使其改变想法或行为。常与“晓之以理”连用。
Used to persuade others to change their minds or behavior. Often used with “xiǎo zhī yǐ lǐ”.
Examples
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面对犯错的孩子，父母既要晓之以理，又要动之以情。
miànduì fàncuò de háizi, fùmǔ jì yào xiǎo zhī yǐ lǐ, yòu yào dòng zhī yǐ qíng.
When facing a wrong child, parents should both reason with him and move him with emotion.
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谈判中，动之以情往往比晓之以理更有效。
tánpàn zhōng, dòng zhī yǐ qíng wǎngwǎng bǐ xiǎo zhī yǐ lǐ gèng yǒuxiào
In negotiation, moving with emotion is often more effective than explaining with reason.