Therefore, if anyone is in Christ, he is a new creation. The old has passed away; behold, the new has come. (2 Corinthians 5:17)
The acts of the sinful nature are obvious: sexual immorality, impurity and debauchery; idolatry and witchcraft; hatred, discord, jealousy, fits of rage, selfish ambition, dissensions, factions and envy; drunkenness, orgies, and the like. I warn you, as I did before, that those who live like this will not inherit the kingdom of God. (Galatians 5:19-21)
To win this battle we must be skilled in using our weapons.
But the fruit of the Spirit is love, joy, peace, long suffering, kindness, goodness, faithfulness, gentleness, self-control. Against such there is no law. (Galatians 5:22-23)
Love: Outgoing concern for others. True concern for all of mankind. Not being self-centered. Doing for others what is right, despite their character, appearance, social status, etc. (I Corinthians 13).
Joy: Related to happiness, only happiness requires right circumstances where joy does not. Jesus Christ felt joy though He faced heavy trials (Hebrews 12:2). We should all be joyful having been called by God.
Peace: Peace of mind and peace with God (Philippians 4:6-7).
Kindness: Behaving toward others kindly, as God has behaved toward us (Ephesians 4:31-32).
Goodness: Generosity of spirit that springs from imitating Jesus Christ (Psalm 33:4-5).
Faithfulness: Being reliable. This describes a person who is trustworthy and will always stand up for God’s way. We can count on, and should work at imitating, the faithfulness of God (Philippians 1:6; Hebrews 13:5).
Self-Control: Discipline which gives us victory over the wrong pulls of our mind and body (I John 2:15-17).
As with all tools it takes time and experience to use them well. Hammers will hit your thumb. Crayons will draw outside the line. Sewing needles will prick your finger.
Never be discouraged. Pick up and start over. In this, Peter the Apostle may be our best example.