Abraham Maslow said this quote

We fear our highest possibility (as well as our lowest one). We are generally afraid to become that which we can glimpse in our most perfect moments.

~ Abraham Maslow

One's only rival is one's own potentialities. One's only failure is failing to live up to one's own possibilities. In this sense, every man can be a king, and must therefore be treated like a king.

~ Abraham Maslow

But behavior in the human being is sometimes a defense, a way of concealing motives and thoughts, as language can be a way of hiding your thoughts and preventing communication.

~ Abraham Maslow

Work is that which you dislike doing but perform for the sake of external rewards. At school, this takes the form of grades. In society, it means money, status, privilege.

~ Abraham Maslow