Everyone can do something good. Some just need encouragement to do so.
A friend of mine whom I believe to be the only regular reader of this blog often told me to write more often. At first I wasn’t so motivated (I still depended on my moodto write) but one day he told me again to write more often and I got motivated. I started to write everyday without caring much about the result.
I often failed in exam until one day I told my mother, “What’s the use in studying? I still fail and forget anyway.” Then she told me that it would be worse if I didn’t study. “Failure is fine; at least you try,” she said.
If someone you know does something good or is on the edge of giving up, it’s your duty as a human being to help and encourage them (speaking in Dan Howell’s style).