No Sacrifice for Sin: Were the Jews being warned not to continue in sin and rely on the sacrificial system in Hebrews 10? [Hebrews 10:18, 26, 6:4]. Impossible to Renew to Repentance: Does Hebrews 6:4-6 actually mean that you can go too far, and be unable to return to Christ? [Hebrews 5:12f, 6:4-6, James 5:19, Luke 1:37].