Pride is a sense of worth derived from something that is not organically part of us, while self-esteem derives from the potentialities and achievements of the self. We are proud when we identify ourselves with an imaginary self, a leader, a holy cause, a collective body or possessions. There is fear and intolerance in pride; it is sensitive and uncompromising. The less promise and potency in the self, the more imperative is the need for pride. The core of pride is self-rejection.
It is true that when pride releases energies and serves as a spur to achievement, it can lead to a reconciliation with the self and the attainment of genuine self-esteem.
The Passionate State of Mind, aph. 35 (1955)