What the Bible says about nous
(From Forerunner Commentary)
At this juncture, the apostle reaches his goal in this passage: the subject of judging or discernment. With the Spirit working in us, we now have the ability to discern true from false, right from wrong, good from evil from God's perspective. By writing that "we have the mind [Greek nous] of Christ," Paul means that we can have the thoughts, intellect, or understanding of Christ! However, in this context, the meaning of nous is even more specific: "the faculty of judgment; the ability to discern." In other words, we can learn to judge just like Christ. This is overwhelming to consider, but it is ultimately the goal of the work of God's Spirit in us.
Obviously, this fact places tremendous responsibility on us, as well as an extraordinarily high goal before us. It requires us to exercise our spiritual faculties of understanding and judgment far more than we probably do, but what great purpose does not call for equally great effort?
Richard T. Ritenbaugh
What Is Real Conversion? (Part Five)