But as they sat eating, there came outside a terrible crash of thunder, and a wind arose that seemed as if it would rend the great hall from its foundations. In the midst of this blast the hall was lighted by a sudden gleam seven times brighter than the midday light, in whose glare the knights sat dumb, none daring to speak. But each looked at the others, and it seemed to each that his fellows were fairer of visage than he had ever seen them before.
Then the storm and the glare passed away as suddenly as they had come, and there entered the hall the holy grail. None there saw it, for it was covered with white samite, but the hall was filled with the rarest odors, and each knight saw on the table before him the meats and drinks that he loved best in the world.
When the holy vessel had passed through the hall, it suddenly vanished, none knew how. And not till then dared any man speak.
"Certes," said the king, "we ought to thank God devoutly for what he has shown us this day."
"We have enjoyed the richest of perfumes, and have before us the rarest of food," said Gawaine; "and we have but one thing to regret, that the sacred vessel was so preciously covered that no eye might behold it. But this miracle has filled my soul with the warmest desire to see this holy thing, and I therefore vow that to-morrow, without delay, I shall set out in quest of the Sangreal, and shall not return hither till I have seen it more openly, if it take me a twelvemonth or more. If I fail in the end, I shall return as one who is not worthy to behold the holy vessel."
On hearing these words the other knights arose as one man, and repeated the vow which Gawaine had made.
Upon this, King Arthur sprang to his feet in deep displeasure, for there came to his mind like a vision a host of evil consequences from this inconsiderate vow.
"You are over-hasty, Gawaine," he said, sharply, "and have done me a lifelong evil with your vow. For you have bereft me of the fairest fellowship that ever came together in this world. When my knights depart hence on that difficult search, well I know that they will never all meet again in this world, for many shall die in the quest. Therefore it distresses me deeply, for I have loved them as I loved my life, and I would rather have my soul depart from my body than to lose their noble fellowship. Long have we dwelt together in sorrow and in joy, but I fear our happy days are at an end, and that trouble and suffering await us in the time to come. What God wills must be, but my heart is sore at the thought of it."
And men who looked upon the king could see tears of distress and grief flowing from his eyes.