Psychologist Quotes and aphorisms about both Carl Jung Karl A. Menninger Wayne Dyer Wayne Dyer ,, To be more childlike, you don't have to give up being an adult. The fully integrated person is capa... Jean Piaget Jordan Peterson ,, Our physiological constitution is obviously a product of Darwinian processes, insofar as you buy th... Jordan Peterson Erich Fromm Phil McGraw Martin Seligman