Sometimes God stirs out of comfortable situations to stretch us and cause us to use our faith. We may not like it, and it may not always be comfortable, but God loves us too much to just leave us the way we are.
This is indeed true. I've seen God restore to me parts of me that I'd thought I'd lost. I've seen Him give me a new heart, a new mind. I've seen Him put new sinews into me, spiritually speaking, that weren't there before.