Motivation, Passion and Drive

What sparked this post was a friend asking me "what motivates you?", a question asked to help me do better at the ABS Nationals. To that, I had no answer, which was strange because it's not a difficult question. Instead I said that I am driven and I have a lot of passion for the things that I do, especially for climbing. But what actually motivates me?? Food and travel I think. Oh and sleep. 

Merriam-Webster Definitions for the three:

mo·tive

1: something (as a need or desire) that causes a person to act

pas·sion

4 a (1) : emotion "his ruling passion is greed" (2) plural : the emotions as distinguished from reason b : intense, driving, or overmastering feeling or conviction c : an outbreak of anger

5 a : ardent affection : love b : a strong liking or desire for or devotion to some activity, object, or concept c : sexual desire d : an object of desire or deep interest

drive

a : an urgent, basic, or instinctual need : a motivating physiological condition of an organism (a sexual drive) b : an impelling culturally acquired concern, interest, or longing (the drive to succeed)

Hmmm, these definitions are not satisfying enough for me... Psychologists believe that having motivation is a large part of survival.  I'm thirsty, therefore I will drink this water, I'm hungry, so I will eat etc. But for me, is climbing really something I need to survive? Maybe...

I am passionate about practically everything that I do, in terms of work and play. But when I think about it, nothing really motivates me to do anything in my life. Money or the amount of money is generally not a motivator; otherwise I would be working a lot more than I do now. I feel that I am satisfied with my lifestyle the way it is, until something changes. In all, I don't believe that I have motivation...

Motivation, passion and drive could be explained by an example of a car getting from point A to point B.  What Jenn and I decided is that the fuel is passion, the engine is the drive, and the driver is motivation. Motivation can then be described as the source that allows one to get to a destination. The navigator. But, it is clear, that after talking with some friends, some often lack one of the three. Two of my closest friends have said that they are driven and totally motivated, but possess no passion. Do you really need all three to be successful? Do you need all three to be happy? I feel I am a fairly happy individual, when I get the things that I want.  So, maybe for me, happiness is the motivator.

I'd love to hear your thoughts and beliefs on this subject. I am baffled by all of this. This was quite a confusing and difficult post to write, as I still have no idea what I am talking about.