I have surveyed about the severe types of sins. There are lot of sins we commit everyday knowingly or unknowingly- to tell lie, be dishonest, to breach trusts of people, to torture people, to insult gentle people and a lot. There are two types of sin amongst above are very severe–to murder or kill somebody and crimes to fulfill sexual desires or sex oriented crimes. Remember, The God may forgives all crimes including murder also very difficultly but he never never, never, never forgives the crimes which are sexually oriented.