Many Christians feel more comfortable with the idea that apart from Christ they can do nothing, than they do with the other side of that coin: that they can do all things through Him who strengthens them. "I can do nothing" lets me off the hook; "I can do all things" makes me wonder why I'm not doing anything. It's easier to piddle around wondering whether it's God's will that you rent this apartment or that one, than it is to face up to God's ultimate will for you: that you become conformed to the image of His Son.