Heaven is without time, so when Adam met with the Angel they used a place reserved for such things- For discussion, time is essential. Adam entered the place (which appeared to him to be the main room of the hut he had lived his life in) and kissed the earthen floor.
The Angel entered after, manifested as an elongated octahedron suspended in space. Like all Angels, it was blind. The creator knows the place and nature of all things, and communicates this to them as needed- they navigate without difficulty, but know only the names of colors, not the thing that is blue-ness.

"You are unhappy" said the Angel. "Why? Is it not enough to partake in glory eternal? That the angels bow down to you, the center and subject of all creation? Why is there lament in heaven, that place in which there is no lament?"

Adam answered. "Don't you know? Surely the knowledge of the creator is perfect!"

The Angel rotated once and then spoke. "The creator surely knows the reason, but has not seen fit to show it to his servants, in keeping with the perfect wisdom of creation's design."

"What differentiates man from angel?" asked Adam.

"We are mere machineries of the creator's will, " replied the angel "and have no souls to call our own. We are automatons."

"And does this will have an end?"

The angel answered without hesitation. "The creator has no end, thus there is no end to its will."

"If we were angels," said Adam "we would be satisfied."

"If you were Angels there would be no purpose to creation. You are not Angels, but men."

"There is no purpose to creation in any event- Men in heaven or moldering in the earth are not distinct- our sight is useless, as there is no change.  All colors have become gray to us. We walk the golden streets like machineries without a will to guide us."

The Angel protested. "Men have wills of their own. That is the soul crafted in the image of the creator. The body is the soul's temple, as creation is to the creator."

"And the eyes?"

"They are the soul's window to the world. The creator, in divine and perfect knowledge, needs no analog" answered the Angel.

"Then man is no reflection of the creator at all. The eyes are the seed that drives the will. When the will is undriven a man is no different from another moldering in the earth."

"I do not understand." The Angel was disturbed. "In heaven eyes are unnecessary. You are everlasting."

"We are not everlasting." replied Adam. "We have already come to an end. Heaven must change."

When Adam had gone the Angel stayed and contemplated the puzzle that Adam had offered him. "Heaven cannot change- it is unchanging, in the image of the creator." It resolved finally. "And man is not happy. If man is to preserve himself as an image of the eternal, he must have a place created in his own image. The Angel is a blind servant of the creator, and has no understanding of such things. There must be similar servants to build this place, who understand its nature." It rotated through a quarter turn about its major diagonal. "Man has been promised everlasting life and has been provided with it. Man requires everlasting sight." The Angel set about to act on its discovery.