are we indispensable?

this past weekend, i accepted a call as the pastor of a church just north of louisville. for the last several days i have been thinking and planning for the coming work at our new church home.
as the accompanying ambition that come with such thoughts began to grow, i came across this quote:

...the christian must never for one moment imagine himself to be
indispensable to god, or allow himself to behave as if he were.
the god who sent him, and is pleased to work with him, can
do without him.-j.i. packer

to follow that quote with another,
" ...for the sake of the world, i thank the lord that
the truth's not contingent on me."
- derek webb, "the truth"

praise be to our god, who is self-sustaining and self-sufficient. how mysteriously wonderful that he chooses to use broken vessels to further his kingdom.