In the
Apology of Socrates (written by
Plato), after
Socrates is
sentenced to death, he addresses the
court. He ponders the nature of death and summarizes that there are two major
schools of thought on the
afterlife. The first is that it is a
migration of the soul or
consciousness from this existence into another, and that the
souls of all previously deceased people will also be there. This excites Socrates, because he will be able to conduct his
dialectic inquiries with all of the great
Greek heroes and thinkers of the past. The other opinion about death is that it is oblivion, the complete cessation of consciousness, not only unable to feel but a complete lack of
awareness, like a person in a deep,
dreamless sleep. Socrates says that even this oblivion does not frighten him very much, because while he would be unaware, he would correspondingly be free from any
pain or suffering. Socrates stated that not even the great
King of Persia could say that he ever rested so soundly and peacefully as he did in a dreamless sleep.
Cicero, writing three centuries later in his treatise
On Old Age, in the voice of
Cato the Elder, similarly discussed the prospects of death, frequently referring to the works of earlier Greek writers. Cicero also concluded that death was either a continuation of consciousness or cessation of it, and that if consciousness continues in some form, there is no reason to fear death; while if it is in fact eternal oblivion, he will be free of all worldly miseries, in which case he should also not be deeply troubled by death. Similar thoughts about death were expressed by the
Roman poet and
philosopher Lucretius in his first-century BC
didactic poem
De rerum natura and by the ancient
Greek philosopher Epicurus in his
Letter to Menoeceus, in which he writes: == Scientific views ==