Jesus was preaching about someone breaking the law where they would be "liable to the court" (Mt 5:21). This pertains to judgment and Jesus has "'the keys of death and of Hades'" (Rev 1:10). There will be "retribution to . . . those who do not obey the gospel" (2Th 1:8). "Those who do not know God" (:8) often don't consider the consequences. "He became to all those who obey Him the source of eternal salvation" (Heb 5:9). But if you don't obey "'you will not enter the kingdom of heaven'" (Mt 5:20). Some offenses are more serious and Jesus said the least is processed by the "court" ("22), the next by the "supreme court" (:22) and the last,"'guilty enough to go into fiery hell'"(:22). Fiery hell is "geenna" which is a symbolic name for the final place of punishment of the ungodly. Jesus said, "'Fear Him who is able to destroy both soul and body in hell" (10:28) resulting in your "whole body to go into hell" (5:30). Avoid being "cast into the fiery hell" (18:9). Jesus asked, "'Will you escape the sentence of hell?'" (23:33). You can become as a "'son of hell'" (:15).