What does 1 Peter 1:13 mean?
Where will we set our hope today, in this life, on this side of eternity? That's what Peter is addressing in verse 13.What does it mean to set or fix our hope on something? It's a question of where we will turn to find meaning for our lives, to find relief from suffering, to fill up the emptiness that every soul experiences (Romans 8:22–25). With what will we occupy our hearts? In what will we invest our thoughts, energy, and focus? If all that Peter has told us so far in this letter is true—that we, as Christians, will be resurrected as Christ was, that God guards us and our inheritance with Him in eternity, that our salvation is secure—then there is only one logical place to set our hope. That is in God's grace to us at the future coming of Jesus, the moment in which all the longings of our hearts will be fully satisfied.
Still, even for those of us who believe, it is difficult for us to keep our hope set on that day. In fact, we are told to make a deliberate choice to set our hope there. We need to do this on purpose, instead of setting our hope on things that cannot truly satisfy, such as money, pleasure, or prestige. Obeying this command will take mental work. So Peter writes that we should stay alert, "preparing your minds for action."
We must take control of where our thoughts go, and what our minds dwell on. If we do not fully engage in intentional hope-setting, we will be easily distracted by the false hope of satisfaction the world continually offers us.