The parable is obvious in meaning. Both houses looked fine with simple observation, but one is deceptive. There's no foundation. When, not if, both houses go through the "torrent" - flood or catastrophic experience - it becomes obvious which house was real and which one was deceptive. When we simply say, "Lord, Lord," but do not do what we know Jesus said to do, we've moved into a deceptive house. Collapse and destruction always comes. When we do what Jesus said to do, no torrent or flood so much as shakes the house.