"To find a rainbow adorning the skies, John, the raindrops require the perfect and precise alignment with the onlooker's visual. It needs the angle, the prism flaring only because the reflection's at its absolute. Thus, beauty is merely in the eye of the beholder."
Sipping his tea with an endearing smile, John followed what Sherlock so keenly observed.
"You're saying it doesn't exist?"
"No," Sherlock replied calmly. "It can be measured, manipulated, deduced and pinned into bright white - obviously, it exists." He focused on John, eyes pervasive, trying to catch that one single drop which began the phenomena.