Nathaniel Branden — American Psychologist born on April 09, 1930,

Nathaniel Branden was a Canadian–American psychotherapist and writer known for his work in the psychology of self-esteem. A former associate and romantic partner of Ayn Rand, Branden also played a prominent role in the 1960s in promoting Rand's philosophy, Objectivism. Rand and Branden split acrimoniously in 1968, after which Branden focused on developing his own psychological theories and modes of therapy... (wikipedia)

The first step toward change is awareness. The second step is acceptance.
If we are happy within ourselves, we don't accept or demand that our partner should fulfill every need. We need to be comfortable with our own company.
I cannot remember a time when the question of why people behave as they do was not intensely interesting to me. The desire to understand was very important. When I was young, I was aware of the fact that much of the time, the reasons a person gave for his actions were not the actual reasons.
Self esteem is the reputation we acquire with ourselves.
There is overwhelming evidence that the higher the level of self-esteem, the more likely one will be to treat others with respect, kindness, and generosity.