This site will help you answer this question.
http://www.ryerson.ca/~glassman/humanist.html
People often make career changes in their lives. How would the humanistic theory of behavior explain this phenomenon?
2 answers
Humanistics believe that two things motivate humans: the need for growth,and the need to avoid pain. Further, humanists believe that rational humans are capable of choosing activities that satisfy growth needs, and capable of avoiding activities that induce pain. The humanists view then, that a human can seek out activities that satisfy his need for self actualization, thus making his motivations clear and meeting them.
This is my wording, you may want to use the words in your text, texts have a way of making it sound complex.
This is my wording, you may want to use the words in your text, texts have a way of making it sound complex.