Children, it is the last hour, and as you have heard that antichrist is coming, so now many antichrists have come. Therefore we know that it is the last hour. They went out from us, but they were not of us; for if they had been of us, they would have continued with us. But they went out, that it might become plain that they all are not of us. (1 John 2:18-19 ESV)
Under the Old Covenant, sinners would confess what they had done against the Lord. They would then bring a guilt offering to the Lord to atone for their sin. This guilt offering was variable not on the extent of the guilt of the offender but upon the amount that the person could afford to sacrifice, making it affordable for everyone to be able to make sacrifice for their sin….
Such is the graciousness of God. On the other hand, there are such things as highhanded sins. These are sins for which there is no available sacrifice for which to offer to make atonement. These are capital offenses like murder, adultery, bestiality, homosexuality, kidnapping, et cetera. The only recourse was the death of the offender for they were seen as sinning with a high hand against God. These sins were in every sense deliberate.
For if we go on sinning deliberately after receiving the knowledge of the truth, there no longer remains a sacrifice for sins, but a fearful expectation of judgment, and a fury of fire that will consume the adversaries. (Hebrews 10:26-27 ESV)