Bells were attached to the high priest’s garments so that sound be heard when he comes into the sanctum before the LORD. Quoting this verse, the Rabbis teach that before entering a room, one must knock on the door. Similarly, we are standing at the doorway to a new year and must knock before crossing its threshold. We must announce who we are, where we’re coming from and what it is we intend to do – and only then may we enter the new year.