Plutarch, De defectu oraculorum
Goodwin, Ed.

The company remaining a while in silence, Ammonius, addressing himself to me, said: Prithee, Lamprias, let us take care of what we say, and not be rash in our assertions; for we do not well when we make the God to be little or no cause of these oracles ceasing; for he that attributes the failing of them to any other cause than the will and decree of the God gives occasion to suspect him of believing that they never were nor are now by his disposition, but by some other means. For there is no other more excellent and noble cause and power which can destroy and abolish divination, if it be the work of a God. And as for Plantiades's discourse, it does not at all please me, as well for the inequality and inconstancy which he attributes to the God, as for other reasons. For he makes him sometimes rejecting and detesting vice, and sometimes admitting and receiving it, just as a king, or rather a tyrant, who drives wicked people out of one gate, and receives them through another, and negotiates with them. But the greatest and most perfect work, that will admit of no additions, is that which agrees best with the dignity of the Gods. By supposing this, we may in my judgment affirm that in this common scarcity of men, occasioned by the former wars and seditions over all the world, Greece has most suffered; so that she can with much difficulty [p. 12] raise three thousand men, which number the single city of Megara sent heretofore to Plataea. Wherefore if the God now forsakes several oracles which anciently were frequented, what is this but a sign that Greece is at this time very much dispeopled, in comparison of what it was heretofore; and he that will affirm this shall not want for arguments. For of what use would the oracle be now, which was heretofore at Tegyra or at Ptoum? For scarcely shall you meet, in a whole day's time, with so much as a herdsman or shepherd in those parts. We find also in writing, that this place of divination where we now are, and which is as ancient as any, and as famous and renowned as any in all Greece, was for a considerable time deserted and inaccessible, by means of a dangerous creature that resorted hither, namely a dragon. Yet those that have written this did not well comprehend the occasion of the oracle's ceasing; for the dragon did not make the place solitary, but rather the solitude of the place occasioned the dragon to repair hither. Since that time, when Greece became populous and full of towns, they had two women prophetesses, who went down one after another into the cave. Moreover, there was a third chosen, if need were; whereas now there is but one, and yet we do not complain of it, because she is sufficient. And therefore we do not well to repine at Providence, seeing there is no want of divinations, where all that come are satisfied in whatever they desire to know. Homer tells us, Agamemnon had nine heralds, and yet with these could he hardly keep in order the Greeks, they being so many in number; but you will find here that the voice of one man is sufficient to be heard all over the theatre. The oracles then spake by more organs or voices, because there were then a greater number of men. So that we should think it strange, if the God should suffer the prophetical divination to be spilt and run to waste like water, or everywhere [p. 13] to resound, as in solitary fields we hear the rocks echoing the voices of shepherds and bleating cattle.