According to McDougall, behavior is the result of “internal striving” an “urge to live”. How true this is in my case?

I completely agree with the concept of McDougall that behavior is the result of “internal striving” an “urge to live”. In my case I want to become a good psychologist so I really do hard work to achieve good grades in psychology. The internal striving, that is the wish to become a psychologist compels me to take psychology as majors. I do watch You tube videos (kind of behavior) for more learning and to fulfill my urge to live. The wish to become a psychologist directs my behavior to make relation with certain company, to read specific type of books and specific type of surfing on Google search engine. So it is true in my sense, that behavior is the result of internal striving. What is your Case?