God encourages believers in their walk with Him by giving them spiritual victories in their lives. But many Christians don't understand how easily these victories can be twisted into vices. When we forget where our power comes from, when we are tempted to take the credit for these victories, suddenly God-sufficiency becomes self-sufficiency, and the sin of pride takes over our lives. Jesus' disciples fell into this trap after a successful week of witnessing, and Jesus lovingly reminded them, and us, who ultimately has the power over the kingdom of darkness.