Is this statement new to you ? It is also new to me but it is old news for Paul, John and our Lord Jesus Christ and the Holy Spirit. Want proof or proofs ? See John 16:33, 1 John 4:4, Galatians 6:14.
If after looking at the verses, the title is still not clear to you, let me try to explain. We know Jesus Christ was crucified for our sins. In Galatians 2:20 Paul said he is crucified with Christ ( and based on that we are too). But also in Galatians 6:14 Paul said may he never boast except in the cross of our Lord Jesus Christ, through which the world has been crucified to me and I to the world.
So if Jesus was crucified , and Paul is crucified with Christ and the world is crucified to Paul then the world then is crucified to Christ.
Therefore the world has lost its power over us. Praise the Lord Jesus Christ who gives us victory over the world.