Jesus taught his disciples about sin and its result.

Mark 9:42-48

42 Jesus also said, “But if you cause someone who believes in me to sin, God will severely punish you, even if that person is socially unimportant like this little child. If someone tied a heavy stone around your neck and you were thrown {and threw you} into the sea, you would consider that was a severe punishment. But God will punish you more severely than that if you cause a person who believes in me to sin.43-44 So, if you are wanting to use one of [MTY, PRS] your hands to sin, stop using your hand! Even if you have to cut your hand off and throw it away to avoid sinning, do it [HYP]! It is good that you not sin and that you live eternally, even though you lack one of your hands while you are here on earth. But it is not good that you sin and as a result God throws your whole body into hell. There the fires never go out!45-46 If you are wanting to use one of [PRS] your feet to sin, stop using your foot! Even if you have to cut off your foot to avoid sinning, do it [HYP]! It is good that you not sin and live eternally, even though you lack one of your feet while you are here on earth. But it is not good that you sin and go to hell. 47 If because of what you see [MTY, PRS] you are tempted to sin, stop looking at those things! Even if you have to gouge out your eye and throw it away [HYP] to avoid sinning, do it! It is good that you not sin and live eternally, even though you lack one of your eyes while you are here on earth. But it is not good that you sin and, as a result, God puts your whole body in hell. 48 In that place people suffer forever and the fires are never put out {never go out}.”