If you aren’t satisfied with what you have, and are envious of other people, even if you did finally get what they have, it eventually wouldn’t be enough.
To me, kindness is genuine and from the heart, and it pours out. It doesn't hurt (in fact, quite the opposite) and it's absolutely, completely and truly genuine, no question about it... Niceness is society-driven manners and mannerisms, like hiding and disregarding emotions in public because ...
There is a concept in Zen Buddhism known as shoshin, which means “beginner’s mind.” Shoshin refers to the idea of letting go of your preconceptions and having an attitude of openness when studying a subject.