deliberately: Open rebellion against God's laws was called "sinning with a high hand" (see study note on Numbers 15:30–31). Here, the author refers to rejecting Christ and his work. Christ's sacrifice for sins ended the old covenant's sacrificial system (Hebrews 9:11–10:18). If someone rejects the Son's sacrifice, there is no other sacrifice for forgiveness. A person who rejects Christ can only expect judgment as one of God's enemies (compare Isaiah 26:10–11).