Here the word "sober" refers to mental clarity and alertness. See how you translated this in 1 Peter 1:13. Alternate translation: "Control your thoughts" or "Be careful about what you think"
Peter compares the devil to a roaring lion. Just as a hungry lion completely devours its prey, the devil is seeking to completely destroy the faith of believers. Peter teaches his readers that Satan can harm their bodies, but if they trust in God and obey him, they will always be God's people, and God will care for them. If your language has a word for the way an animal walks when it is hunting, you may use it here.