Seneca suffers from asthma and according to what he says, physicians of the day called asthma "practicing how to die" - which some have also called philosophy!
He notes it would be
absurd to take delight in such supposed restoration to health, as it would be for a defendant to imagine that he had won his case when he had succeeded in postponing his trial.
Rather than taking delight that he's overcome a bout with asthma, Seneca reassures Lucilius that he has "never ceased to rest secure in cheerful and brave thoughts." He has long pondered the before and after of living, and arrived at the conclusion he's already lived death before he was born!
would you not say that one was the greatest of fools who believed that a lamp was worse off when it was extinguished than before it was lighted? We mortals also are lighted and extinguished; the period of suffering comes in between, but on either side there is a deep peace. ... it has both preceded us and will in turn follow us.
Let me pull on this thread a bit more, because this metaphysical idea is worth contemplating. In this analogy, the lamp always exists, regardless if it were lit or unlit. The fact that the lamp is always there, would be similar to stating that you – your essence and even your body – always exists as long as the cosmos exists. Before the lamp is lit, your essence and your body are not manifested. But then you come into existence – the lamp is lit. Eventually, the lamp will be blown out, but it will be lit again. Metaphysically speaking, the Stoics believe in the ekpyrosis (see definition in lexicon) or the notion that the Cosmos experiences a period of destruction and exists as pure fire, before it returns again to what it was before, in which the pure fire, or pneuma is mixed the elements. Given this context, death is nothing be a pause between existence and therefore is nothing to fear. And because he has spent time contemplating death, he claims he is ready for it and won't be frightened when it comes and will go willingly.
