A right heart is a heart that FEELS CONFLICT within it (Gal. 5:17). It finds within itself two opposing principles contending for the mastery—the flesh lusting against the spirit, and the spirit against the flesh. It knows by experience what Paul means when he says, “I see a law in my members warring against the law of my mind” (Rom. 7:23). The wrong heart knows nothing of this strife. The strong man keeps the wrong heart as their palace, and their goods are at peace (Luke 11:21). But when the rightful King takes possession of the heart, a struggle begins which never ends until death. The right heart may be known by its warfare, quite as much as by its peace.

source: www.jcryle.info

Scripture

Galatians 5

17 For the flesh lusts against the Spirit, and the Spirit against the flesh; and these are contrary to one another, so that you do not do the things that you wish. -nkjv

17 For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would. -kjv

17 For the desire of the flesh is against the Spirit, and the Spirit against the flesh; for these are in opposition to one another, in order to keep you from doing whatever you want. -nasb

17 For the flesh desires what is contrary to the Spirit, and the Spirit what is contrary to the flesh. They are in conflict with each other, so that you are not to do whatever you want. -niv

Romans 7

23 But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. -nkjv

23 But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members. -kjv

23 but I see a different law in the parts of my body waging war against the law of my mind, and making me a prisoner of the law of sin, the law which is in my body’s parts. -nasb

23 but I see another law at work in me, waging war against the law of my mind and making me a prisoner of the law of sin at work within me. -niv

Luke 11

21 When a strong man, fully armed, guards his own palace, his goods are in peace. -nkjv

21 When a strong man armed keepeth his palace, his goods are in peace: -kjv

21 When a strong man, fully armed, guards his own house, his possessions are secure. -nasb

21 “When a strong man, fully armed, guards his own house, his possessions are safe. -niv