Whenever we are seeking to follow Christ, there will be dangers – false prophets (15-20), empty profession (21-23). Clearly, our faith must be grounded in the Son of God and the Word of God. This is the point of Jesus’ parable of the two builders and the two houses (24-27). We must build upon Christ. We must build on the Word of God. Jesus’ ‘sermon’ ends in verse 27, and is followed – in verses 28-29 – by a statement of its effect upon His hearers. Down through the centuries, Jesus’ teaching continues to make this impression on people. His words come to us with authority, addressing us with remarkable relevance. We imagine that our time is very different from Jesus’ time, yet Jesus’ words make it very clear – things are not so different after all. Still, we hear Him speaking as One who has authority. His Word is unchanged, unchanging and unchangeable.