He could see the tall, peeling yellow building at the periphery of his range of vision. But something about it struck him as strange. A shimmer, an unsteadiness, as if the building faded forward into stability and then retreated into insubstantial uncertainty. An oscillation, each phase lasting a few seconds and then blurring off into its opposite, a fairly regular variability as if an organic pulsation underlay the structure. As if, he thought, it's alive.
The character notices a tall, deteriorating yellow building in the distance that appears unusual to him. It seems to oscillate between solidity and uncertainty, creating an effect that makes it feel almost alive. This strange sensation of the structure fluctuating intrigues him, as it presents a vision of something more than just a mere building.
This pulsating quality suggests an organic or dynamic nature, making him question the very essence of reality around him. The perception that the building has a life of its own evokes deeper philosophical reflections about existence and stability, themes often explored in Philip K. Dick's work.