The problem with Christianity: religion vs spirituality. Religion is just a routine or ritual that a person feels has to be done or act out, while spirituality is having that inward belief and connection (relationship) with God. A true Christian (Born again) is spiritual not religious.
(James 1: 26-27) 26 If anyone among you thinks he is religious, and does not bridle his tongue but deceives his own heart, this one’s religion is useless. 27 Pure and undefiled religion before God and the Father is this: to visit orphans and widows in their trouble, and to keep oneself unspotted from the world.
Letting go of anger and negativity in your heart is like opening up an old chest to find dust and dead bugs in it. You and others become disgusted by it and don’t want to deal with it, but it has to be cleaned up and rid of it’s filth in order to restore that which is pleasant.
(Mark 11:25-26) 25 “And whenever you stand praying, if you have anything against anyone, forgive him, that your Father in heaven may also forgive you your trespasses. 26 But if you do not forgive, neither will your Father in heaven forgive your trespasses.”
(Hebrews 12:14-15) 14 Pursue peace with all people, and holiness, without which no one will see the Lord: 15 looking carefully lest anyone fall short of the grace of God; lest any root of bitterness springing up cause trouble, and by this many become defiled;
Why do you boast in evil, O mighty man? The goodness of God endures continually. 2 Your tongue devises destruction, Like a sharp razor, working deceitfully. 3 You love evil more than good, Lying rather than speaking righteousness. Selah 4 You love all devouring words, You deceitful tongue.
5 God shall likewise destroy you forever; He shall take you away, and pluck you out of your dwelling place, And uproot you from the land of the living. Selah 6 The righteous also shall see and fear, And shall laugh at him, saying,7 “Here is the man who did not make God his strength, But trusted in the abundance of his riches, And strengthened himself in his wickedness.”
8 But I am like a green olive tree in the house of God; I trust in the mercy of God forever and ever. 9 I will praise You forever, Because You have done it; And in the presence of Your saints I will wait on Your name, for it is good.
10 Create in me a clean heart, O God,
And renew a steadfast spirit within me.
11 Do not cast me away from Your presence,
And do not take Your Holy Spirit from me.
12 Restore to me the joy of Your salvation,
And uphold me by Your generous Spirit.
13 Then I will teach transgressors Your ways,
And sinners shall be converted to You.
14 Deliver me from the guilt of bloodshed, O God,
The God of my salvation,
And my tongue shall sing aloud of Your righteousness.
15 O Lord, open my lips,
And my mouth shall show forth Your praise.
16 For You do not desire sacrifice, or else I would give it;
You do not delight in burnt offering.
17 The sacrifices of God are a broken spirit,
A broken and a contrite heart—
These, O God, You will not despise.