a couple of quotes from Andy Stanley, in his book Visioneering,
"God-ordained visions are always too big for us to handle."
( consider the source!)
"Few things provide our faith with a more thorough workout than a divinely-ordered vision. Faith is simply an expression of confidence in the person and character of God. Embracing and owning a vision is in itself an act of faith. Pursuing a divine vision is really an act of worship. It is a declaration of our confidence in God. It is a proclamation of how important we believe his agenda to be. And God is honored."