Emotions such as anger, fear, sorrow, grief, despair, and any other negative expressions of mind, will or emotions have to be controlled by the Holy Spirit ruling and reigning in our lives.  This takes time and discipline.  When negative thoughts seek to overthrow your spiritual thoughts (thoughts in line with God's word) you need to resist them.  I speak to thoughts of fear and say "I resist you fear".  In the beginning it seemed that I was saying this more than just about anything, but today fear doesn't have much of a chance in my thought life. Emotions are natural expressions of the body and soul. They will "naturally" come out depending upon your situations.  As a spirit lead believer our spirit should have superiority.  Expressions of spirit are called "fruit of the spirit".  We are told in Galatians 5:22-23 that the fruit of the spirit is "love, joy, peace, longsuffering, kindness, goodness, faithfulness, gentleness, self-control."   When a person's spirit is in charge rather than his/her soul or body the expression of his/her spirit will be these things.  It takes practice, discipline to develop your spirit self.  Your flesh has had control more years than your spirit self, so you in effect have to retrain your senses.  When you want to thump a person for treating you poorly, the fruits of the spirit of spirit of longsuffering, self-control and love can help you overcome the desire to "react."
	Your body:  You should remember that your body is like an earth suit.  Without it you would have no authority to live on this planet.  When you slough it you will leave this planet.  We are told (Romans 12) to make our bodies living sacrifices as a reasonable service to God.  A rudimentary study of sacrifices in the Tanakh will give you a deeper understanding of what is required of a "living" sacrifice. Isaiah 53 tells us that Yeshua was a sacrifice and gives a really good picture of how to present your body.  Too many of us let our "earth suits" speak.  Whether in appetite or in pain, our bodies have way too much say in how we conduct our everyday lives.  Our flesh is enmity with our spirit person and is subject to the spirit.  Your flesh can be retrained to take it's subordinate place with discipline and time with the Father.
	Your mind:  Just because you're out of school and married or dedicated to the L-rd doesn't  mean you should quit growing.  3 John 2 says "Beloved, I pray that you may prosper in all things and be in health, just as your soul prospers". NKJV  Your soul is made up of your mind, will and emotions.  If your soul doesn't grow you can't prosper and your can't be in health.  The first way to expand your mind is to read the word and meditate on what it says.  Then you look for ways to do what it says.  We're also told that we're to guard our hearts.  Your heart is your spirit.  Many people will read anything, or watch anything that comes on TV.  We have the freedom in Yeshua, but not everything is good for us.   Let me illustrate again.  Let's say you're believing to be free of fear.  You speak the word, you trust God, you love your neighbor and you shun sin, but you watch every news broadcast that comes on.  Oh yes, your favorite TV programs are about policemen, firemen, crime fighters of every kind and maybe a mystery or two thrown in for good measure. The next thing you know you have a new fear in a new area and no matter how much faith you exert, it seems fruitless.  You've simply overthrown your faith with too much time dedicated to your desire to watch TV.  "Out of the abundance of the heart the mouth speaketh".  You've filled your thoughts with one thing and are trying to speak something else.   No success.  This is where fasting comes in.  Fasting can be food, fasting can be doing without anything that has too much control over YOU.  You use your spirit to discipline your mind and body.  Fasting is "Just saying NO".