One evening an old Cherokee Indian told his grandson about a battle that goes on inside people. He said, ‘My son, the battle is between two ‘wolves’ inside us all. One is Evil. It is anger, envy, jealousy, sorrow, regret, greed, arrogance, self-pity, guilt, resentment, inferiority, lies, false pride, superiority, and ego.
The other is good. It is joy, peace, love, hope, serenity, humility, kindness, benevolence, empathy, generosity, truth, compassion and faith.’
The grandson thought about it for a minute and then asked his grandfather: ‘Which wolf wins?’
The old Cherokee simply replied, ‘The one you feed.’ ~ Author unknown

Although this parable is not in the Bible, the apostle Paul describes the battle of these opposing forces or wolves in greater detail.

15 But I say, walk by the Spirit, and you will not gratify the desires of the flesh. 17 For the desires of the flesh are against the Spirit, and the desires of the Spirit are against the flesh, for these are opposed to each other, to keep you from doing the things you want to do. Galatians 5:16-17
“No one can serve two masters. Either you will hate the one and love the other, or you will be devoted to the one and despise the other. You cannot serve both God and money. Matthew 6:24 NIV (Money in this context of scripture is a symbol of the fleeting desires or things in the world you give priority over God. They become your idol and the master you serve).
The good wolf is the Spirit of Christ in you when you asked Jesus to be your Lord and Savior. At that moment all of the seeds of God’s spiritual fruits were implanted in you.
22 But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control; 23 against such things there is no law. Galatians 5:22-23 NIV

The evil wolf is your imperfect, sinful flesh which is self-focused, desire driven and influenced by the devil. These two forces are at war in the layer of your soul. Your soul is your mind, your conscience, your will, your emotions, and your actions.
Each aspect of your soul has an individual and group function within the synergy of your soul. It is vital for you to understand each aspect of your soul and how it affects your life or you are making your soul, your spiritual heart’s core, your core needs, and your identity vulnerable to the enemy. You alone can choose which one you feed. Choose life and feed yourself God’s word every day and live in all of His goodness and blessings.