"For if we go on sinning willfully after receiving the knowledge of the truth, there no longer remains a sacrifice for sins" Hebrews 10:26
10:26 we. The author is speaking rhetorically. In verse 39, he excludes himself and genuine believers from this category. sin willfully. The Greek term carries the idea of deliberate intention that is habitual. The sin is rejecting Christ deliberately. These are not isolated acts. According to the Mosaic legislation, such acts of deliberate, premeditated sin required exclusion from the congregation of Israel (cf. Numbers 15:30, 31) and from its worship (cf. Exodus 21:14). Such sins also excluded the individual from sanctuary in the cities of refuge (cf. Deuteronomy 19:11–13). knowledge. The Greek term denotes specific knowledge, not general spiritual knowledge (cf. Hebrews 6:4; cf. 1 Timothy 2:4). Though the knowledge was not defective or incomplete, the application of the knowledge was certainly flawed. Judas Iscariot is a good example of a disciple who had no lack of knowledge, but lacked faith and became the arch-apostate. no longer. See note on Hebrews 6:6. The apostate is beyond salvation because he has rejected the only sacrifice that can cleanse him from sin and bring him into God’s presence. To turn away from that sacrifice leaves him with no saving alternative. This is parallel to Matthew 12:31 (see note there).
The MacArthur Study Bible. 1997 (J. MacArthur, Jr., Ed.) (electronic ed.) (1914–1915). Nashville, TN: Word Pub. www.gty.org