Excerpt from "Think Biblically!"

The Renewed Mind
When a person enters into a personal relationship with Jesus Christ, he/she becomes "a new creation" (2 Cor 5:17) who sings "a new song" (Ps 98:1). But that does not mean that everything becomes new in the sense of perfection in one's current walk. The mind acquires a new way to think and a new capacity to clean up old ways of thinking. Unquestionably, God is in the business of mind renewal for Christians. "Do not be conformed to this world, but be transformed by the renewal of your mind..." (Rom 12.2) "...and to be renewed in the spirit of your minds" (Eph 4:23). "...and have put on the new self, which is being renewed in knowledge after the image of its creator" (Col 3:10).

The Bible says to "Set your minds on things that are above, not on things that are on earth" (Col 3:2). Paul put this concept in military terms: "We destroy arguments and every lofty opinion raised against the knowledge of God, and take every thought captive to obey Christ" (2 Cor 10:5).

How does one do this? Scripture is the mind of God. Not all of His mind, to be sure, but all that God cared to give believers. To think like God, one must think like Scripture. That's why Paul encouraged the Colossians "Let the word of Christ richly dwell within you, with all wisdom teaching and admonishing one another..." (Col 3:16). At salvation, Christians are provided with a regenerated mental ability to comprehend spiritual truth. After salvation, Christians need to readjust their thinking chiefly by mind renewal, using the Bible as the means to do so. While the ultimate goal is to have a full knowledge of God and His will (Eph 1:18; Col 1:9-10), the believer must always be on guard lest he/she return to foolish and unbliblical thought patterns due to the lingering effects of sin.

Excerpt from the book "Think Biblically!" which was published by Crossway Books and John MacArthur was the general editor, the article was written by Richard L. Mayhue