According to Carl Rogers's humanistic theory of personality, what needs to be in congruence for an individual to become a fully functioning person?

Carl Rogers (1902-1987) was a humanistic psychologist who agreed with the main assumptions of Abraham Maslow, but added that for a person to "grow", they need an environment that provides them with genuineness (openness and self-disclosure), acceptance (being seen with unconditional positive regard), and empathy (being listened to and understood).

Without these, relationships and healthy personalities will not develop as they should, much like a tree will not grow without sunlight and water.

Rogers believed that every person can achieve their goals, wishes and desires in life. When, or rather if they did so, self actualization took place. This was one of Carl Rogers most important contributions to psychology and for a person to reach their potential a number of factors must be satisfied.