His answer was, "Because you're you. And it wouldn't occur to you to do otherwise". Part of me wanted to be annoyed with him for saying what he did, but the honest part of me accepted that he was speaking the truth.
It wouldn't occur to me to lesson my workload. Partially because of how much I love what I do and partially because it's the way I'm wired. In fact, my husband often jokes that my having too much free time on my hands is a dangerous thing. For him, I think ;-)
Now that I am doing what makes my Soul sing I don't want to waste a minute of precious time. I want to do what I came here to do. I want to fulfill my mission. And at this point in my life my mission requires much of my time and effort.
I have been imprinted with a drive that gets me up and moving very early in the morning and carries me through to quite late in the evening. With no ill effect... apart from occasional crankiness and self doubt.
So when I ask "Why do I do this?" I already know the answer. And I am most grateful that I get to do the work I do.