10:26 sinning deliberately. Christians who claim to be sinless are self-deluded (1 John 1:8), and those who sin should not despair of grace (4:16; 1 John 2:1, 2). The willful sin here is abandoning one’s confession altogether, trampling the Son underfoot, treating His sacrificial blood as unclean, and insulting God’s gracious Spirit (6:6 note; 10:29). The seriousness of the charge is indicated by its willfulness (cf. Num. 15:30) and the measure of knowledge or enlightenment it refuses (cf. Heb. 6:4; 10:32).

no longer remains a sacrifice for sins. Since God has set aside the Levitical system of animal sacrifices (v. 9), those who abandon their confession of trust in Christ have nowhere to turn for forgiveness.