The first time I heard this quote I was in a church basement. I was a youth group leader and our group was participating in a two week mission project in our community. I learned a lot and experienced a lot during that time but the thing that stuck with me the most is this quote. "The place God calls you to is the place where your deep gladness and the world's deep hunger meet." Let that sink in for just a minute. It seems to me that a lot of people think that in order to do answer God's call they have to struggle and sacrifice and be unhappy. The reality is that is not the case. Yes, sometimes we struggle and make sacrifices, but God wants us to be happy! He has given each of us unique talents, passions and goals because each of us has a unique plan for each of us that requires the perfect combination of a whole lot of things. When we're following a call it's easy to focus on the struggles and completely lose sight of the big picture. The realized dream and accomplished goal mean more than what we've "missed".
I often relate this to camp. If given the choice between relaxing on a beach or spending the day at camp, I'd chose camp every time. I don't think I'm missing out on summer. It's okay that camp isn't going to make me a millionaire, the "sacrifice" of living on a budget isn't really a sacrifice when it means I'm working at camp. Doing what makes me happy, what brings me deep gladness is exactly what God has called me to do.