Soru

Read the passage carefully:

Silas held the brass spyglass to his eye, though he knew the gesture was entirely empty. The damp salt air of the coast had long since crept between the glass lenses, sealing within them a permanent shroud of condensation that no cloth could reach. To peer through it was to look into a perpetual morning fog, where the horizon dissolved and the great merchant vessels were reduced to formless, hovering smudges. Yet daily he returned to the cliffside porch, extending the heavy metallic tubes with a click that sounded to him like the cocking of a useless pistol. Below, the tide churned against the black rocks, throwing up a cold spray that tasted of brine and decay. His sister, Martha, often urged him to discard the instrument, pointing to the modern, clean-cut binoculars that sat pristine on the parlor table. But Silas clung to the clouded glass. Through its obscured view, the sea ceased to be a highway of commerce and busy men; it became instead a quiet, formless void that matched the silent, unhurried rhythm of his own fading years, shielding him from the sharp edges of a world he no longer wished to see clearly.

In the passage, the permanent condensation inside the spyglass's lenses primarily symbolizes which of the following?