Next sentence

"A person with a heart will do a thing with a heart" is a saying. There is no fixed next sentence. Different sentences can be used in different contexts. The following are some examples:

1. "Those who are thoughtful will do the things they care about, and those who are careless will do the things they are careless about." This sentence emphasizes that people's attitude and efforts are crucial to the success or failure of things. A thoughtful person will take things seriously and work hard, while a careless person may be careless and cause things to fail.

2. "Those who care will do what they care about, and lovers will eventually get married." This sentence expresses people's beautiful expectations for love and marriage. A caring person will manage the relationship carefully, and eventually the lover will get married.

3. "Those who have a will can do what they have a will, and where there is a will, there is a way." This sentence emphasizes the importance of people's ambition and determination to success. Those who are determined will work hard for their goals, and those who are ambitious will persevere and eventually realize their ideals.

4. "Those who care about things have their own problems, and those who are heartless will eventually become strangers." This sentence expresses people's different attitudes and results towards feelings. A caring person will cherish the relationship, but a heartless person may hurt the other person, which will eventually lead to the relationship breaking up and becoming a stranger.