This last petition of the Lord’s prayer helps to create in us a healthy disillusionment with this world and a longing for the heavenly kingdom where Isaiah 11:9 will be a reality: “They will neither harm nor destroy on my holy mountain; for the earth will be full of the knowledge of the LORD, as the waters cover the sea.” 

“Wake up to your need for me and wake up to where real security lies. No military power or technology or human factor can make you safe. Only in the very center of my will is there any safety. You don’t have the human ability to control things. You need me.”

C.S. Lewis points out that times of war or disaster don’t really increase the amount of misery and death in the world, but they concentrate it and wake us from our illusion that life is manageable.

“If we had foolish hopes about human culture, they are now shattered. If we thought we were building up a heaven on earth, if we looked for something that would turn the present world from a place of pilgrimage into a permanent city satisfying the soul of man, we are disillusioned, and not a moment too soon. In ordinary times only the wise realize it. Now (in war-time) the stupidest of us knows it.” (C.S. Lewis, “Learning in War-Time”)