When the time comes for the metzora, who was sent away from Israelite camp, to start the cleansing process, we are told…He shall be brought to the kohen, and the kohen shall go outside the camp…Tiferet Shlomo explains that whenever people are distant, this process is true. Each side must take steps towardn the other – he shall be brought to the kohen but he need not go the whole way for the kohen shall go outside the camp to meet him.