Throughout this letter, the author has been warning the readers about the dangers they would face if they gave in to the temptation to desert Christ in order to avoid persecution. In this passage, he returns once again to this theme. He shows what believers have in Christ, and what awaits those who look to the Law for their justification.
We see that the Law and the way it was given were intended to develop the fear of God in His people and ultimately to drive them to Christ, the only one who could save them from the anger and wrath of God. How foolish, then, having fled to Christ from the thundering of the Law, to return to the condemnation of the Law once again.
Believers are encouraged to stay close to Christ and not to be tempted to play with sin and the world - not to renounce the Savior but to cleave to Him. Unbelievers are shown that they are still at the fearful Mount Sinai and are exhorted to embrace Christ for salvation from the condemnation of the Law.