Most battles won have been won because of being equipped with the proper weaponry. Though the substance may be different in Christian warfare, the same theme prevails. No believer is nearly as successful in battle as he is when he dons “the whole armour of God” (Ephesians 6:11). This armour assists the believer as he seeks to stand “against the wiles of the devil” (Ephesians 6:11). This armour defends the loins with truth, the vital organs with righteousness (Ephesians 6:14), the head with salvation (Ephesians 6:17), and the entirety with faith (Ephesians 6:16). The same armour provides the offensive weaponry in the word of God and prayer (Ephesians 6:17-18). Notice that the spiritual weaponry lacks any emphasis upon the physical.
A tender heart quickly and readily yields when offered correction; however, as a heart becomes hardened, the times of yielding become fewer and farther apart. During the hardening process, the individual finds the true nature of the heart more difficult to grasp. As the heart further hardens, the individual finds himself involved in further defiance. The mischief may start as seemingly insignificant, but a hardening heart will ultimately lead to greater depths of wickedness, some seemingly unimaginable only a short time ago. Some of the worst sins committed in the Bible by God's people were committed by those who shortly before had displayed a tender heart. Yet, they allowed their hearts to be hardened by the deceitfulness of sin.