An alien spaceship is approaching the earth. It has only two passengers whose bodies are in hibernation but whose minds are telepathically in communication. One is the captain of the ship and has the ability to receive and process vast amounts of information from the electromagnetic waves he senses when adjacent to a celestial body. The other is his son and is developing similar talents as they travels through the galaxy with his father and mentor.
"What is the people of this planet yearning so much for, father?"
"Love."
"What are those other things they're chasing then?"
"Shadows and dust, my son."