Here's another thing to think about:
the difference between appreciating someone and flattering them.

Flattery is used by untrustworthy people; appreciation is honest.

"Flattery is counterfeit. What is the difference between appreciation and flattery? That is simple. One is sincere and the other insincere. One comes from the heart out; the other from the teeth out. One is unselfish and the other selfish. One is universally admired; the other universally condemned."

So appreciation would be, I liked your point and I'm going to try to learn from it. Flattery would be, you must be a handsome man to be so smart. See the difference? The first person is trustworthy; the second is being "nice," which is a way to control you. Being "nice" is a different form of loan-sharking. Instead of giving you something to make you owe them, they are giving you flattery in order to make you owe them. Those people are untrustworthy.