How awesome it is to have the ministry of the Spirit informing us, guiding our decisions and revealing the truth when it would be outside the reach of our natural sensibilities. Discernment is a gracious offering from God to His children to protect them from deception. But discernment works by faith and must be cultivated like any other gift through use.
We must choose to operate from a spiritual mind-set rather than a carnal one. When we are open to the leading of God's Spirit, He will give us discerning wisdom that may be totally hidden from us otherwise. The more we use our powers of spiritual discernment, the more keenly developed they will become.