原文 Original text
繁體 Traditional
Reader's edition
黑氣濃厚 Black Vapour Smothers the Light
卻說那大聖在半空中，又見那黑氣濃厚，把祥光盡情蓋了，道聲：「不好，不好！黑氣罩暗祥光，怕不是妖邪害俺師父？却说那大圣在半空中，又见那黑气浓厚，把祥光尽情盖了，道声：「不好，不好！黑气罩暗祥光，怕不是妖邪害俺师父？
逐句解 Line by line
卻說那大聖在半空中，又見那黑氣濃厚，把祥光盡情蓋了，道聲：「不好，不好！
却说那大圣在半空中，又见那黑气浓厚，把祥光尽情盖了，道声：「不好，不好！
Now the Great Sage, up in mid-air, saw that the black vapour had grown thick and had covered over the auspicious light entirely, and he said aloud, "This is bad, this is bad!
盡情 is "to the full, without holding anything back" — the black has not merely spread over the gold, it has taken all of it.
黑氣罩暗祥光，怕不是妖邪害俺師父？
黑气罩暗祥光，怕不是妖邪害俺师父？
Black vapour darkening the lucky light — is that not some fiend harming my master?
He phrases it as a question and the question is rhetorical. Pilgrim has watched the colour over his master change, and colour is evidence he trusts.
The two vapours have now met and one has won. This is the whole plot of the chapter compressed into a single visual: gold merit overlaid by black intent, seen from above by the one person who can see it.
It is worth noticing how little Pilgrim actually knows. He does not know what the black thing is, where it came from, or what it wants. He knows only that his master's light has gone out. Everything he does for the rest of the chapter follows from that one observation, and nobody on the ground will accept it as grounds for anything.