At the risk of stating the obvious, in order to have the mind of Christ we must have a change of mind.
This is what is envisaged in the New Testament command to ‘repent’. The Greek word means, according to Strong’s definition, ‘to think differently’. W E Vine’s Expository Dictionary of New Testament Words tells us that metanoeo signifies ‘to change one’s mind or purpose’.
To prevent this occurring, ‘the god of this world hath blinded the minds of them that believe not’ (2 Corinthians 4:4, KJV) lest they ‘see’ the reasonableness of the need to repent. If our spiritual disability is to be rectified, it requires the gracious ministration of the heavenly physician, through the healing balm of the Holy Spirit. Just as the Lord Jesus proved expert in the treatment of this malady when here on earth, so He remains able to bring ‘recovery of sight to the blind’ (Luke 4:18).
With this problem dealt with, ‘God, who commanded the light to shine out of darkness, is able to shine in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ’ (2 Corinthians 4:6). A new act of creation is undertaken by the One who originally commanded ‘let there be light’ (Genesis 1:3). The saved individual is born again, becoming ‘a new creation; old things have passed away; behold, all things have become new’ (2 Corinthians 5:17). This new man is the possessor of a new mind, ‘the mind of Christ’.
There is just one problem. The ‘old man’ nature, with its evil benighted mind, remains in us. The Bible points out that ‘a double minded man is unstable in all his ways’ (James 1:8). To address this instability, we must suppress the influence of our sinful nature by developing the mind of Christ. ‘Those who live according to the flesh set their minds on the things of the flesh, but those who live according to the Spirit, the things of the Spirit’ (Romans 8:5).