Old Law & New Testament Fasting: Is there a difference between the requirements of the Old Law regarding fasting and expectations of fasting in the New Testament? [Matthew 6:16-18, Matthew 9:15, 2 Samuel 12:13-25, Mark 2:19]. New Wine in Old Skins: Would you explain the significance of the new wine in the old skins, and how it might align with the Old and New Law? [Matthew 9:16-17, Mark 2:22].