2 Corinthians 3:6, which states that "the letter kills, but the Spirit gives life."
Paul, of course, didn't mean that we could ignore New Testament restrictions which we deem cultural in favor of pursuing activities that we "sense the Spirit leading" us toward. Rather, He wrote that small sentence in order to address the false teachers who infiltrated the church in Corinth with the doctrine that Gentile converts must observe Jewish laws of atonement and cleansing. Those laws, Paul explained in Romans 7:7-12, served to show us that we are dead in our sin, and require the Holy Spirit to bring us regeneration.
When people use the last fragment of 2 Corinthians to justify women in leadership, premarital sex, homosexuality, extra-biblical revelation or anything else that relegates Scripture to a position below their subjective spiritual experiences, they essentially make a non-verbal statement that God does not have permission to put them in a box.