One of the biggest mistakes Christians make today is applying Old Covenant promises to New Covenant believers and the classic example of this is Jeremiah 29:11 which reads, "for I know the plans I have for you," declares the LORD, "plans to prosper you and not to harm you, plans to give you hope and a future." Christians have thoroughly succeeded in ripping this piece of Scripture so far out of context, that few even question it anymore. Read in isolation, it appears as though God is speaking to the individual and promising him a life of great prosperity and success. However, read in context, we see that God was talking to the ancient Israelites who were actually in exile in Babylon at the time. And the promise was in fact for after the exile, which lasted 70 years (Jeremiah 25:11-12). While it is true that this verse gives us insight into God's character, it does not mean the promise applies to us as New Covenant believers.