Ephesians 4:23

²¹ Surely you heard of Him and were taught in Him—in keeping with the truth that is in Jesus—

²² to put off your former way of life, your old self, which is being corrupted by its deceitful desires;

to be renewed in the spirit of your minds;

²⁴ and to put on the new self, created to be like God in true righteousness and holiness.

²⁵ Therefore each of you must put off falsehood and speak truthfully to his neighbor, for we are all members of one another.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

Romans 12:2
Do not be conformed to this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what is the good, pleasing, and perfect will of God.
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Romans 8:6
The mind of the flesh is death, but the mind of the Spirit is life and peace,
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Psalms 51:10
Create in me a clean heart, O God, and renew a right spirit within me.
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Colossians 3:10
and have put on the new self, which is being renewed in knowledge in the image of its Creator.
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1 Peter 1:13
Therefore prepare your minds for action. Be sober-minded. Set your hope fully on the grace to be given you at the revelation of Jesus Christ.
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Ezekiel 36:26
I will give you a new heart and put a new spirit within you; I will remove your heart of stone and give you a heart of flesh.
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Titus 3:5
He saved us, not by the righteous deeds we had done, but according to His mercy, through the washing of new birth and renewal by the Holy Spirit.
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Ezekiel 11:19
And I will give them singleness of heart and put a new spirit within them; I will remove their heart of stone and give them a heart of flesh,
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