80. Vasishtha replied:--The fire and moon are the mutual causes and effects of one another, as they are mutually productive as well as destructive of each other by turns. 81. Their production is by alternation as that of the seed and its sprout (of which no body knows is the cause or effect of the other). Their reiteration is as the return of day and night, (of which we know not which precedes the other). They last awhile and are lost instantly like the succession of light and shade (the one producing as also destroying the other). 82. When these opposites come to take place at the one and same time, you see them stand side by side as in the case of the light and shade occurring into the daytime, but when they occur at different times, you then see the one only at a time without any trace of the other, as in the occurrence of the daylight and nocturnal gloom by turns. (These two are instances of the simultaneous and separate occurrence of the opposites. Gloss). 83. I have also told you of two kinds of causality; namely, the one in which the cause is co-existent with its effect, and the other wherein the effect comes to appearance after disappearance of its cause or the antecedent. 84. It is called the synchronous causation which is coeval with its effect, as the seed is coexistent with its germ, and the tree is contemporaneous with the produced seed. 85. The other is named the antecedent or preterite cause, which disappears before the appearance of its consequent effect; as the disappearance of the day is the cause of its subsequent night; and the preteriteness of the night, causes the retardation of the following day. (In plain words it is the concurrence and distance of the cause and effect, called the [Sanskrit: samaváyo] and [Sanskrit: amasáváyo kárana] or the united or separate causality in Nyáya-terminology). 86. The former kind of the united cause and effect (called the [Sanskrit: sadrúpa parináma] _i.e._ the presence of both causality and its effectuality); is exemplified in the instance of the doer and the earthen pot, both of which are in existence; and this being evident to sight, requires no example to elucidate it. 87. The kind of the disunited cause and effect (called the [Sanskrit: binásharúpa parináma]) in which the effect is unassociated with its (cause); the succession of day and night to one another, is a sufficient proof of the absence of its antecedent causality. (This serves as an instance of an unknown cause, and hence we infer the existence of a pristine darkness, prior to the birth of day-light [Sanskrit: tame ásít] _teomerant_). 88. The rationalists that deny the causality of an unevident cause, are to be disregarded as fools for ignoring their own convictions, and must be spurned with contempt. (They deny the causality of the day and night to bring one another by their rotation which no sensible being (can ignore). They say [Sanskrit: dinasá rátri nirmmasa katritamsti])