Here is an easy guide you can read through daily to help you overcome bitterness and be restored to joy in the Lord;
Ephesians 4:31-32 – Let all bitterness and wrath and anger and clamor and slander be put away from you, along with all malice. Be kind to one another, tenderhearted, forgiving one another, as God in Christ forgave you.
Hebrews 12:15 – See to it that no one fails to obtain the grace of God; that no “root of bitterness” springs up and causes trouble, and by it many become defiled;
Ephesians 4:31 – Let all bitterness and wrath and anger and clamor and slander be put away from you, along with all malice.
Acts 8:23 – For I see that you are in the gall of bitterness and in the bond of iniquity.”
Matthew 6:14-15 – For if you forgive others their trespasses, your heavenly Father will also forgive you, but if you do not forgive others their trespasses, neither will your Father forgive your trespasses.
Ephesians 4:26 – Be angry and do not sin; do not let the sun go down on your anger,
Hebrews 12:14-15 – Strive for peace with everyone, and for the holiness without which no one will see the Lord. See to it that no one fails to obtain the grace of God; that no “root of bitterness” springs up and causes trouble, and by it many become defiled;
Proverbs 15:1 – A soft answer turns away wrath, but a harsh word stirs up anger.
James 1:19-20 – Know this, my beloved brothers: let every person be quick to hear, slow to speak, slow to anger; for the anger of man does not produce the righteousness of God.
Proverbs 10:12 – Hatred stirs up strife, but love covers all offenses.
Job 10:1 – “I loathe my life; I will give free utterance to my complaint; I will speak in the bitterness of my soul.
Job 7:11 – “Therefore I will not restrain my mouth; I will speak in the anguish of my spirit; I will complain in the bitterness of my soul.
Romans 3:14 – “Their mouth is full of curses and bitterness.”
Proverbs 20:22 – Do not say, “I will repay evil”; wait for the Lord, and he will deliver you.
Colossians 3:8 – But now you must put them all away: anger, wrath, malice, slander, and obscene talk from your mouth.
Romans 12:17-21 – Repay no one evil for evil, but give thought to do what is honorable in the sight of all. If possible, so far as it depends on you, live peaceably with all. Beloved, never avenge yourselves, but leave it to the wrath of God, for it is written, “Vengeance is mine, I will repay, says the Lord.” To the contrary, “if your enemy is hungry, feed him; if he is thirsty, give him something to drink; for by so doing you will heap burning coals on his head.” Do not be overcome by evil, but overcome evil with good.
Mark 11:25 – And whenever you stand praying, forgive, if you have anything against anyone, so that your Father also who is in heaven may forgive you your trespasses.”
Ecclesiastes 7:9 – Be not quick in your spirit to become angry, for anger lodges in the bosom of fools.
Proverbs 14:10 – The heart knows its own bitterness, and no stranger shares its joy.
Proverbs 17:25 – A foolish son is a grief to his father and bitterness to her who bore him.
Job 21:25 – Another dies in bitterness of soul, never having tasted of prosperity.
Romans 12:2 – Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect.
James 1:26 – If anyone thinks he is religious and does not bridle his tongue but deceives his heart, this person’s religion is worthless.
Proverbs – Good sense makes one slow to anger, and it is his glory to overlook an offense.
Proverbs 15:18 – A hot-tempered man stirs up strife, but he who is slow to anger quiets contention.