How do we know we are regenerated according to Paul?

The Apostle Paul speaks of regeneration in the context of the new birth in Romans 7. He states that until one is born of the Spirit, they cannot comprehend nor discern spiritual truths—this includes the acknowledgment of sin within our flesh. According to Romans 7:18, an awareness of our inability to perform good works stems from the new creation God has effectuated in us. The natural man receives not the things of the Spirit, but the spiritual man has discernment and understanding of God's righteousness. Thus, the ability to recognize sin and to cherish the law of God confirms the work of regeneration within us.