26 For if we sin willfully after we have received the knowledge of the truth, there no longer remains a sacrifice for sins, 27 but a certain fearful expectation of judgment, and fiery indignation which will devour the adversaries. (Hebrews 10:26–27)
While some sins are committed in ignorance (a lack of knowledge), some sins are committed with full knowledge of their sinfulness (Acts 3:17; 1 Tim. 1:13). Notice in our passage that the human will at work both to receive the knowledge of the truth and to sin in spite of that knowledge. This is a clear warning not to sin deliberately. No sinner who willfully engages in sin will be forgiven while in open rebellion against the Lord. Willful sin shows one is not fearful of God’s fiery indignation against His adversaries. And make no mistake; when a Christian sins willfully he makes himself God’s enemy. If you know the truth, then abide in the truth (Jno. 8:31-32). If you do not know the truth, learn it and live it. Choosing not to know the truth of God will not save you in the day of judgment.