Change your life by changing your mind. The Bible calls it repentance. That is a true change of mind that changes your life by the grace of God. Only the Spirit of God can renew your mind. The Bible calls that conversion. The Holy Spirit is able to transform your mind. And do not be conformed to this world, but be transformed by the renewing of your mind (Romans 12:2). Call on the Lord, asking Him to grant you repentance.
Your mind is transformed through the Lord Jesus Christ. You are enabled to understand the will of God. The renewed mind understands that prayer is conversation with God. A transformed mind refuses to be conformed to the world of unbelief. Let this mind be in you which was also in Christ Jesus (Philippians 2:5).
Your mind is transformed through the word of truth, reading the Bible with increased understanding. The Bible is now more than old stories of people who lived long ago. It's a renewed book because your mind is renewed. The Holy Spirit, who inspired the authors of the Bible, is now continuing to renew your mind through the Bible.
Your mind is transformed with new understanding. By faith we understand(Hebrews 11:3). The spiritual man, unlike the natural man, can understand the things of God. But the natural man does not receive the things of the Spirit of God (1 Corinthians 2:14). By the grace of God, through faith in Jesus Christ, your life is changed as your mind is transformed.