“Be of sober spirit, be watchful. Your adversary, the devil, prowls around like a roaring lion, seeking someone to devour.” (1 Peter 5:8 LSB) https://accordance.bible/link/read/LSB#1Pet._5:8
Be sober and be watchful are essentially the same command to be alert, aware, and ready for proper action. How do we do this? By praying without ceasing which is made possible by keeping our minds focused on the ways of God and the work of God as revealed in the word of God. The word of God must saturate our minds so that it fills our hearts occupying our thoughts and desires always. Practically this means waking to read and pray from God’s word then going about our daily business ready to serve those who need help, give to those who need assistance and share with those who need hope. By doing God’s will we accomplish God’s work and build God’s kingdom in the world. Why is this important? In part because the enemy of God is alive and well in this world working himself to thwart the building of God’s kingdom. He steals our building materials, he lies about their availability and he murders those working on building God’s kingdom. Our true adversary is him who deceives men into believing there is no God or that God is ambivalent to the needs of men. Our deeds disprove these lies, our words dismantle his deceit of men. We must know God’s word, do God’s will, and share God’s word in order to accomplish God’s work which is the salvation of the world and the honoring of Him by all men in the world through obedience to everything He has commanded us.