Take note that this key has been entrusted to you by the Lord Jesus. You are, as it were, the porters of a city. Such porters are most unfaithful who permit the entrance of an approaching enemy coming to destroy the city. You would likewise be unfaithful porters if you permit those enemies to enter and to remain within, and thus destroy the congregation which puts her trust in your faithfulness.
You are the cause that the church is becoming degenerate to the core. You are responsible for all the consequences of this. As a result, God’s Name is dishonored, many people are kept from joining the church who otherwise would do so, souls are destroyed who by the use of the keys of God’s kingdom would repent, and the flouring of godliness is obstructed. You will be the cause that one member imitates the other in the commission of evil, and that the godly are oppressed and secretly must sigh over the wretched condition of the church.
Know that the Lord will bring you into judgment for all these things, and that there you will have to give an account of the manner in which you have ruled the church entrusted to you and concerning the souls over whom the Lord appointed you as an overseer. The Lord will demand blood of all those souls who will perish due to the neglect of the use of this key. Oh, what a weighty responsibility this is, and how dreadful will God’s judgment be upon all unfaithful elders! Oh, that many would never have been elders!
–Wilhelmus à Brakel, The Christian’s Reasonable Service, vol. 2, (p. 185).
From The Church and the Surprising Offense of God’s Love (pp. 322-323).