Final answer:
The statement is false; while Carl Rogers emphasized congruence in his humanistic approach to therapy, existential therapy is more focused on individual existence, meaning, and choice.
Step-by-step explanation:
The statement 'The main goal of existential therapy is congruence' is False. Existential therapy focuses on concepts related to existence, such as meaning, choice, and self-determination. Carl Rogers, a humanistic theorist, emphasized congruence within his theory related to self-concept. Congruence occurs when there is a match between an individual's ideal self and real self, influencing a person's self-worth and ability to lead a healthy, productive life. Rogers believed in providing unconditional positive regard, genuineness, and empathy to help individuals reach a state of congruence, but this is specifically part of his client-centered therapeutic approach, rather than existential therapy.