American Psychologist, Philosopher, Professor of Psychology at Brandeis University, Founded Humanistic Psychology and Created Maslow's Hierarchy of Needs
The human being is so constructed that he pressed toward fuller and fuller being and this means pressing toward what most people would call good values, toward serenity, kindness, courage, honesty, love, unselfishness, and goodness.
In the highest love between man and woman, or parent and child, as the person reaches the ultimates of strength, self-esteem, or individuality, so also does he simultaneously merge with the other, lose self-consciousness, and more or less transcend selfishness. The same can happen in the creative moment, in the profound aesthetic experience, in the insight experience…and others which I have generalized as peak experiences.
If we want to know the possibilities for spiritual growth, value growth, or moral development in human beings, then I maintain that we can learn most by studying our most moral, ethical, or saintly people.
Human life will never be understood unless its highest aspirations are taken into account. Growth, self-actualization, the striving toward health, the quest for identity and autonomy, the yearning for excellence (and other ways of striving "upward") must now be accepted beyond question as a widespread and perhaps universal tendency.