Sometimes Other People's Words Work Just Fine

I am reading Raven & Joshua's book Dear Raven & Joshua Questions and Answers about Master/slave relationships and I came to the question where Joshua was asked what he gets out of slavery. His answer was lovely.

"Joshua: Primarily, I get the opportunity to do something real and meaningful with my life. While I wasn‖t exactly discontented with my life prior to being owned, it had never occurred to me to expect any kind of deep fulfillment or purpose from life. Now that I have that, I would not want to be without it. By my actions in service I am able to contribute to greater goals, rather than just keeping myself fed and housed and entertained.
It gives me purpose. My master is doing great work in the world, and by serving him I support that work. I can do more good for the world by serving him than I could on my own. There is a quote I like very much, “There are two ways of spreading light—being the candle or the mirror that reflects it.” I am the mirror, and that‖s valuable work too.
Slavery is remarkably intimate. I never would have tolerated a relationship this intimate without a power dynamic. I prefer to keep people at a distance, and Raven doesn‖t permit that. Having this level of intimacy is challenging, but immensely rewarding.
It prompts spiritual growth. It is an intense and demanding relationship that brings up a lot of issues. Raven tends to force me to work on these issues even when I‖d choose to ignore them and run away. In theory I could do as much work on myself all on my own, but in this relationship, I can‖t avoid it. I‖m not a hugely self-disciplined person, so this is good.
It creates an obligation to take care of myself. Raven doesn‖t want me damaging his property by eating unhealthily, driving recklessly, using recreational drugs, not getting enough sleep, or doing any of the countless things which are bad for me but in the past I often decided were “worth it”. He can require that I act in my own long-term best interest, because he doesn't place a high value on me gratifying my fleeting desires. 

It makes me accountable. My behavior reflects on Raven, and that holds me to a higher standard of behavior than I‖d otherwise be inclined to keep. I can be fairly, um, ethically flexible when left to my own devices.
It teaches me how to spiritually surrender my ego. It is easier for me to surrender to a person in a very tangible way than to surrender myself to the All-That-Is, but the tangible sort of surrender is very good training for the higher sort of surrender. That may be a bit esoteric, but it is a primary motivation for me.
I also get to bring comfort and happiness to someone who I love passionately and deeply. I have deep trust and radical honesty with someone who knows and understands everything about me, and loves me exactly as I am. I get the best sex I‖ve ever had.
I love my job. "

I have tried to express what I get out of slavery but I'm never anywhere near as eloquent as  he is. Although my answer isn't exactly the same of course since we are different people serving different people, it is close enough that his answer resonates with me quite strongly.