Refer back to my entry on “Warriors for His Kingdom”, written several months ago, and Ephesians 6:11-17.
Paul mentions in this scripture the armor of God, in which the sword is the Word of God. The sword is the only piece of armor used for killing, where as the others are used for protection.
I like to think of the sword of God kind of like a softball bat. Playing the game of softball without a bat is like living your spiritual life without reading the Word of God. It is absolutely, one hundred percent essential. No exceptions.