The greatest threat to the Christian is the threat of giving up. It is the absence of perseverance. Our greatest challenge, as seen through the history of the Bible and through the history of the church is to give up faith, to give in to the words of the world, and to trade the blessing God intended for us for a life of futility.
But in this challenge, we have a great hope, that God promises to keep us to the end. As Jesus says in John 10:28–29, “I give them eternal life, and they will never perish, and no one will snatch them out of my hand. My Father, who has given them to me, is greater than all, and no one is able to snatch them out of the Father's hand.”