19+ Cs Lewis Spiritual Warfare Quotes. I'm grateful for the spiritual and . "it is not your business to succeed, but to do right; Good philosophy must exist, if for no other reason, because bad philosophy needs to be answered. You are a poor solidier of christ if you think you can overcome. Lewis cautioned against both imagining a demon behind every tree and believing satan doesn't exist. So we define spiritual warfare as the battle for the mind. Loving people is the highest level of spiritual warfare that we could ever do." — joyce meyer quotes from quotefancy.com. "it was at this low point that i stumbled upon the c. Lewis quotes on god, jesus christ, and christianity. Lewis questioned his proclamation of being an atheist since he converted back to christianity 20 years later.