The Bible tells us in 1 Corinthians 2:14 that “the natural person does not accept the things of the Spirit of God, for they are folly to him, and he is not able to understand them because they are spiritually discerned.”
The natural man is everyone who is not born of the spirit of God. This would include everyone who is not a true Christian. Therefore, at one time, all of us were “natural man” before we believed and confessed Jesus Christ as Lord.
As the Bible says, natural man has no ability to understand things that are spiritual. Why? Because the natural man is spiritually dead until spiritual birth occurs. This means that no one can understand their need for Jesus until they are born again. First comes spiritual birth, followed by spiritual knowledge of our sin and then spiritual knowledge of our need for Christ.
However, there are other implications to this. Natural man, not only doesn’t understand their need for Christ, but they also don’t understand things like the reason for living, the reason for death, the problem with sin, the Creation of the World, the design of marriage, the design of gender roles, etc. These spiritual truths found in the Bible are folly to the natural man.
Therefore, if culture is predominately Christian, most likely, common sense will match Biblical truth. However, as culture shifts to non-Christian, common sense becomes more anti-biblical, and Biblical norms are considered foolish, old-fashion, barbaric, or even hateful. Why? Once again, because what is common is dictated by culture, and if culture is guided by natural man, then it will flow against Biblical truth.
Why is this important? Because in America, culture is changing. No longer are we predominately a Christian nation. Therefore, what is common in America maybe non-Christian. This means that “common sense” may not match biblical truth.
As a Christian, we must be aware of this pitfall. Before we make decisions, before we jump on the bandwagon, we should ask, what the does Bible say about this topic? We should not assume that just because culture leans a certain direction, that it is good. In a predominately non-Christian society we, in fact, should assume that our culture is flowing in the opposite direction as God’s design or purpose. For as it says in James “friendship with the world is enmity with God.”
I would challenge everyone to change the way you reach conclusions. Before opening your mouth, open the Bible. Submit yourself to what God’s Word says about money, power, love, marriage, roles, beauty, politics, taxes, guns, poverty, immigration, etc. You may find out that what you think is common sense is enmity with God.