Psalm 91:13 Thou shalt tread upon the lion and adder: the young lion and the dragon shalt thou trample under feet.
Upon the promise that the Lord will charge His angels to take care of us, He then says that you will tread upon and trample under the lion, the snake and the dragon. Each of these is a Biblical symbol of our Enemy, Satan. Our response to evil is to exercise our God-given faith in the victory and overcoming power in the saving Gospel of Christ.
Jesus has defeated our Spiritual Enemies decisively and once for all at the Cross and the Tomb. The Holy Spirit grants us the victory through faith in Christ and His Gospel message. But we do the treading and trampling. Romans 16:20: “The God of peace will soon crush Satan under your feet.” God does the crushing, but it is under our feet. We hold up the shield of faith and wield the sword of the Spirit, which is the Word of God. God involves us in the day-to-day combat against the forces of evil. The victory belongs to the Overcomer, who gives His overcoming power to us.