[27] I have set thee for a tower and a fortress among my people, that thou mayest know and try their way. [28] They are all grievous revolters, walking with slanders: they are brass and iron; they are all corrupters. [29] The bellows are burned, the lead of the fire; the founder in vain: for the wicked are not plucked away. [30] Reprobate silver shall men call them, because the LORD hath rejected them.