Worry Hinders Our Faith According to our nation's Bureau of Standards, a dense fog covering seven city blocks to a depth of a hundred feet contains less than one glass of water. All of that fog, if it could be condensed into water, wouldn't quite fill a drinking glass. Compare this to the things we often worry about. Like fog our worries can thoroughly block our vision of the light of God's promises, but the fact is, they have little substance to them.