What is my motivation?

Last night the Perspectives speaker spoke on what motivates us to be missionaries. While my motives are good, they may not be what is preeminent--love for Jesus and an all consuming desire for His fame to be spread among all people. I need to do some soul searching. I do desire to see all people come to know and worship Him, but I am also powerfully motivated by compassion and passion for the sick, the orphaned, the discouraged and the hungry. I am going to dissect my heart and again ask God to break my heart with what breaks His and lead me in the perfect way He has for me.