Here, we pick up on the words of verse 16 – ‘the Lord closed the door behind them’. What was going on outside of the ark is contrasted with the haven of salvation inside the ark. What was it that made the ark a place of salvation? – The Lord. What is it that makes Jesus Christ the Source of our salvation? – God has given Him the Name that is above every name, the Name of our salvation (Philippians 2:9-11; Acts 4:12). From the ark, we learn of (a) the one way of salvation – The ark had only one door. Jesus is ‘the Door’ which leads to salvation (John 10:9); (b) the eternal security of salvation – All were safe inside the ark. In Christ there is eternal security (John 10:28); (c) the absolute necessity of salvation – Outside of the ark, there was certain death. Refusal to come to Christ for salvation leads to judgment: ‘How shall we escape…?’ (Hebrews 2:3).