New Perspective Needed

I was talking to someone yesterday about my new teaching position, and a thought occurred to me. I was given a new heart toward it, but perhaps my perspective needs to change as well.
My thinking goes like this:
Our thoughts/focus and our hearts together direct our footsteps. One can easily lead the other astray or in the right direction depending on which one seems stronger. For example, if someone feels "love" toward another person, but they think it isn't a good relationship, they have to choose if they want to believe their heart or their mind. Depending on the truth, either one could be right.
So I find myself in a position where my heart and my mind might not be in exactly the same place. Therefore I run the risk of being led astray by my mind rather than following my heart in times of need.
I feel in my heart that God can use me as a teacher and that he has destined me to at least work here for the next year. I can see that in the school he got me the job at and even the teachers he has surrounded me with. But the comment I made to my friend that caught my attention was this, "The jury is still out on the kids." This refers to the fact that I love my school and my team teachers, but the kids appear to be an unknown factor, as if I don't like the kids as a whole then I won't like teaching and I will want to go back to searching for another career.
But doesn't this disregard my purpose at the school? Doesn't this disregard what God intends for me? I basically just said that if I don't like what God wants for me then I am going to make my own path or find a different way. And didn't I just get done trying that and found it entirely unsatisfying - yes, working at a bread store pays the bills (barely), but it was unsatisfying and un-fulfilling. This is where my perspective in my thoughts needs to be adjusted. It is NOT about ME. LIFE and MY PURPOSE are NOT about ME.
It's crazy because it is totally the opposite of American thinking. This says that just because it's my life doesn't mean I have anything to do with my purpose. It's like God's best for me is not about me.
If I am going to find fulfillment as a fourth grade teacher it is not going to start and end with me but rather with doing what God calls me to do in the lives of others around me.
May my perspective fully shift so that I may be able to seek him first rather than my own agenda.