How to win friends and influence people (title of book)

You can make more friends in two months by becoming interested in other people than you can in two years by trying to get other people interested in you.

When dealing with people, remember you are not dealing with creatures of logic, but with creatures of emotion, creatures bristling with prejudice, and motivated by pride and vanity

I deal with the obvious. I present, reiterate and glorify the obvious / because the obvious is what people need to be told.

Why talk about what we want? That is childish. Absurd. Of course, you are interested in what you want. You are eternally interested in it. But no one else is. The rest of us are just like you: we are interested in what we want.

Really important goals are accomplished by people who will keep trying even when there seems to be no hope.