Assisted dying, including physician-assisted dying and voluntary active euthanasia, is a contemporary medical practice that allows critically ill patients, who are competent and voluntarily request it, to accelerate their deaths with the assistance of clinicians through drugs that are self-administered or administered by staff. Countries such as Canada, Switzerland, New Zealand, and many regions of the United States, Europe, and Australia have legalized some form of assisted dying in medical practice, with variations in specific laws and regulations. Supporters of assisted dying often refer to such deaths as “good deaths” or “death with dignity.” We should recognize that these terms carry different meanings in various contexts. This study aims to define these terms contextually and to explore the ethical implications of assisted dying through the perspectives of Christian ethics, the Confucian perspective, and Islamic principles, considered globally. Without understanding how these terms are defined, there is a risk that the ethical implications may be lost, and assisted dying might be adopted in regions where religious ethics hold sway over law and culture without a thorough examination. Islamic principles, Christian ethics, and Confucianism emphasize the sanctity of life, considering death as a natural part of one’s life cycle (“death in peace”), and accepting it naturally aligns with maintaining harmony and moral integrity. These three religious jurisdictions underscore compassion and moral responsibility in caring for the vulnerable, including those who are dying, fostering a sense of moral duty to alleviate suffering.