The Law of Increase and Decrease is the Law of the Spirit of Life in Christ Jesus. It is impossible to have the Life of the Lord but not have the Law of that Life. And the Law of Life is that Christ must increase.
Therefore, my brethren, you also were made to die to the Law through the body of Christ, so that you might be joined to another, to Him who was raised from the dead, in order that we might bear fruit for God, Romans 7:4
Anywhere the law is preached it produces a mind-hardening and a heart-hardening veil. (2 Corinthians 3:14-15)