What does it mean if you have a heart, you don't have to teach an unintentional person?

"People who have a heart don't need to teach, but people who don't care can't teach" means that people who do things with their heart will learn by themselves on the sidelines even if they don't need to teach, but those who don't care to learn can't learn even if they teach with their heart every day.

Example:

1. People who have a heart don't need to teach, and those who have no heart can't. Alas, if you have no talent and can't learn to drive, I won't teach you. You should be careful.

2. People who have a heart don't need to teach, and those who have no heart can't teach. The key still lies in yourself, and you should learn to be indifferent. If you are pessimistic, naturally nothing will be affected.

A similar sentence is: Nothing is difficult to a willing mind.