Euthanasia refers to intentionally ending a life to relieve suffering from an incurable disease or condition. It can be voluntary, non-voluntary, or involuntary depending on patient consent. Arguments for euthanasia include autonomy, compassion, and controlling suffering, while arguments against include the slippery slope towards non-voluntary euthanasia and that there are alternatives to relieve suffering without intentionally ending a life. Religiously and legally, active euthanasia is generally prohibited but passive euthanasia may be permitted in some circumstances with appropriate safeguards.