Do You Know The Butterfly Effect?

Amelia looked back three times with every step and followed Mrs. Walton in silence. Suddenly, she looked up and asked, "Master, if we can't stop it when we see it, what's the point of catching ghosts?"

Elmer lowered his eyes and said gently, "Of course you can stop it, but do you know the butterfly effect? If you touch a person's fate, it will affect the fate of thousands of people related to him. For example, when Zhang San grows up, he will be evil and commit murder and arson. Ten people will die because of him, and when Zhang San was young, he should have died because of an accident. Then, the ten people would have survived. But you saved him when he was young, so when he grew up, ten people would die. This is fate."

So, it's not that Elmer is cold, but sometimes you don't even know if what you interfere in is right or wrong in the future.