Maybe they sensed that they were waving at themselves, waving in the hope that someday if evidence is demanded of their passage through time, demanded by their own doubts, a moment might be recalled when they stood in a dazzling plaza in the sun and were registered on the transparent plastic ribbon; and thirty years away, on that day when proof is needed, it could be hoped that their film is being projected on a screen somewhere, and there they stand, verified, in chemical reincarnation, waving at their own old age, smiling their reassurance to the decades, a race of eternal pilgrims in a marketplace in the dusty sunlight, seven arms extended in a fabulous salute to the forgetfulness of being. What better proof (if proof is ever needed) that they have truly been alive? Their happiness, I think, was made of this, the anticipation of incontestable evidence, and had nothing to do with the present moment, which would pass with all the others into whatever is the opposite of eternity.