Reason shows mortality. Unamuno, Life 5.1

Reason imposes limits, teaching us that we are mortal, not immortal.


El gran maestro del fenomenalismo racionalista, David Hume, empieza su ensayo Sobre la inmortalidad del alma, con estas definitivas palabras: «Parece difícil probar con la mera luz de la razón la inmortalidad del alma. Los argumentos en favor de ella se derivan comúnmente de tópicos metafísicos, morales o físicos. Pero es en realidad el Evangelio, y sólo el Evangelio el que ha traído a luz la vida y la inmortalidad». Lo que equivale a negar la racionalidad de la creencia de que sea inmortal el alma de cada uno de nosotros.

Kant, que partió de Hume para su crítica, trató de establecer la racionalidad de ese anhelo y de la creencia que éste importa, y tal es el verdadero origen, el origen íntimo, de su crítica de la razón práctica y de su imperativo categórico y de su Dios. Mas a pesar de todo ello, queda en pie la afirmación escéptica de Hume, y no hay manera alguna de probar racionalmente la inmortalidad del alma. Hay en cambio, modos de probar racionalmente su mortalidad.

Sería, no ya excusado, sino hasta ridículo, el que nos extendiésemos aquí en exponer hasta qué punto la conciencia individual humana depende de la organización del cuerpo, cómo va naciendo, poco a poco, según el cerebro recibe las impresiones de fuera, cómo se interrumpe temporalmente, durante el sueño, los desmayos y otros accidentes, y cómo todo nos lleva a conjeturar racionalmente que la muerte trae consigo la pérdida de la conciencia. Y así como antes de nacer no fuimos ni tenemos recuerdo alguno personal de entonces, así después de morir no seremos. Esto es lo racional.


The great master of rational phenomenalism, David Hume (†), begins his essay On the Immortality of the Soul with these definitive words: "It seems difficult to prove the immortality of the soul by the simple light of reason. Arguments in its favor derive generally from premises that are metaphysical, moral, or physical. But the truth is that the gospel is the only thing that has brought life and immortality to light." This amounts to denying that it is rational to believe in the immortality of the individual soul.

Taking Hume as the point of origin for his own critique, Kant sought to establish the rationality of our desire for immortality, and of the belief that this desire brings in its wake. This is the true origin, the intimate origin, of his critique of practical reason, of his categorical imperative, and of his God. But in spite of all that, Hume's skeptical observation remains unshaken, and there is no way to prove the immortality of the soul rationally. But there are rational ways to prove its mortality.

It would be wrong, and frankly ridiculous, to spend time here attempting to set forth the degree to which the individual human consciousness depends on the organization of the body. To explain how how our awareness grows little by little, as the brain receives impressions from outside itself; how it is interrupted temporally, during sleep, loss of consciousness, and other accidents; and how it brings us to the rational conjecture that death entails its permanent loss. As we did not exist before birth and have no personal recollection of that time, so after death we shall cease to be. Such is the tale of reason.


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() David Hume (1711-1776 CE) was born to the Home family, whose surname he later altered for himself, in Scotland. He attended university in Edinburgh very young, perhaps when he was just 10 years old, and found little to interest him there besides books, especially ancient ones, remarking to an acquaintance that these contained anything you might get from a professor. He took no degree, and worked various different professions (merchant's clerk, tutor, secretary, librarian) while writing freely on subjects that interested him. He produced several works, notably these: A Treatise of Human Nature (published 1739-40), which was followed by An Enquiry concerning Human Understanding (1748), then An Enquiry concerning the Principles of Morals (1751), and finally a massive History of England in six volumes (1754-61). Though he applied to be considered for a chair of philosophy at the university of Glasgow, the atheism apparent in his writings disqualified him. He is most famous for observing that we cannot establish historical causality with rational certitude, as every event in history is caused by too many things in conjunction for us to separate out. Translating this perspective into ethics, he argued that irrational passions and emotions are more fundamental to human nature than reason, which is properly their servant and not their masterillustrating, amending, and justifying the orders they give without having independent orders of its own.