Authenticating an Old Coin
Driving home: Our duties to those that are without can, for the most part, be ranged under two headings, the duties of authentication and the duties of proclamation.
Martin uses the analogy of finding and authenticating an old, valuable coin to explain what it means to 'authenticate' something, proving its genuineness, and applies it to the church's duty to prove its identity.
Well, to authenticate something is to prove it to be genuine. Suppose one of you kids should be digging around in the backyard this spring for who knows what, and you come across a coin that looks like a very old coin, and you rub off the dirt and you wash it and you show it to your mom or dad, and your dad, who happens to be knowledgeable a little bit in old coins, gets very excited because he thinks that what you may have found was an authentic coin dating way back to early colonial American days. It'd be worth a lot of money. Some museum might want to buy it.
10:54 - 11:36 Read in full sermon