They shall be purified from all what is unclean and from all rubbish. They shall be purified from worries and entanglements. They shall be purified from prejudice and self-ambitions.  They shall be purified from fears and troubles. They shall be purified from ambiguity and reservations. And the stores of the manifold food of the spirit shall be built.

They shall be purified from all what is unclean

2 Corinthians 6:17

“Therefore, come out from their midst and be separate,” says the Lord.
“And do not touch what is unclean;
And I will welcome you.

and from all rubbish

Philippians 3:8

More than that, I count all things to be loss in view of the surpassing value of knowing Christ Jesus my Lord, for whom I have suffered the loss of all things, and count them but rubbish so that I may gain Christ,

They shall be purified from worries

Matthew 6:34

“So do not worry about tomorrow; for tomorrow will care for itself. Each day has enough trouble of its own.

and entanglements

James 4:13-16

¹³ Come now, you who say, “Today or tomorrow we will go to such and such a city, and spend a year there and engage in business and make a profit.” ¹⁴ Yet you do not know what your life will be like tomorrow. You are just a vapor that appears for a little while and then vanishes away. ¹⁵ Instead, you ought to say, “If the Lord wills, we will live and also do this or that.” ¹⁶ But as it is, you boast in your arrogance; all such boasting is evil.

They shall be purified from prejudice and self-ambitions.

Galatians 5:20

idolatry, sorcery, enmities, strife, jealousy, outbursts of anger, disputes, dissensions, factions,

Ephesians 4:2-3

² with all humility and gentleness, with patience, showing tolerance for one another in love, ³ being diligent to preserve the unity of the Spirit in the bond of peace.

Ephesians 4:31-32

³¹ Let all bitterness and wrath and anger and clamor and slander be put away from you, along with all malice. ³² Be kind to one another, tender-hearted, forgiving each other, just as God in Christ also has forgiven ^[a]you.

Philippians 2:14

Do all things without grumbling or disputing;

They shall be purified from fears and troubles

1 Peter 3:14

But even if you should suffer for the sake of righteousness, you are blessed. And do not fear their intimidation, and do not be troubled,

1 John 4:18

There is no fear in love; but perfect love casts out fear, because fear involves punishment, and the one who fears is not perfected in love.

They shall be purified from ambiguity and reservations.

1 Kings 9:4

(i.e. in integrity, uprightness and faithfulness)

As for you, if you will walk before Me as your father David walked, in integrity of heart and uprightness, doing according to all that I have commanded you and will keep My statutes and My ordinances,

Ephesians 5:8

for you were formerly darkness, but now you are Light in the Lord; walk as children of Light

Ephesians 5:11

Do not participate in the unfruitful deeds of darkness, but instead even expose them;

And the stores of the manifold food of the spirit shall be built.

Hebrews 5:12-14

¹² For though by this time you ought to be teachers, you have need again for someone to teach you the elementary principles of the oracles of God, and you have come to need milk and not solid food. ¹³ For everyone who partakes only of milk is not accustomed to the word of righteousness, for he is an infant. ¹⁴ But solid food is for the mature, who because of practice have their senses trained to discern good and evil.

I encourage you to by this book by Dr. Atef Meshreky that covers all the parts of the inner man.