Jesus goes on to warn his disciples about the problem of the "closed mind" that refuses to learn new things. Jesus used an image familiar to his audience – new and old wineskins. In Jesus' times, wine was stored in wineskins, not bottles. New wine poured into skins was still fermenting. The gases exerted gave pressure. New wine skins were elastic enough to take the pressure, but old wine skins easily burst because they were hard. What did Jesus mean by this comparison? Are we to reject the old in place of the new? Just as there is a right place and a right time for fasting and for feasting, so there is a right place for the old as well as the new. Jesus says the kingdom of heaven is like a householder who brings out of his treasure what is new and what is old (Matthew 13:52). How impoverished we would be if we only had the Old Testament or the New Testament, rather than both. The Lord gives us wisdom so we can make the best use of both the old and the new. He doesn't want us to hold rigidly to the past and to be resistant to the new work of his Holy Spirit in our lives. He wants our minds and hearts to be like the new wine skins – open and ready to receive the new wine of the Holy Spirit.