A veritable witness have you hitherto been, Ishmael; but have a care how you seize the privilege of Jonah alone; the privilege of discoursing upon
the joists and beams; the rafters, ridge-pole, sleepers, and under-pinnings, making up the frame-work of leviathan; and belike of the tallow-vats, dairy-rooms, butteries, and cheeseries in his bowels.
Then she would light her pipe, and leisurely go over her arrangements, looking things over, and discoursing upon
them; making all the young fry scour most vigorously on the tin things, and keeping up for several hours a most energetic state of confusion, which she would explain to the satisfaction of all inquirers, by the remark that she was a "clarin' up.
Albert was soon deeply engrossed in discoursing upon
Paris and Parisian matters, speaking to the countess of the various persons they both knew there.
Everyone is looking at you, and you're discoursing upon
leprosy, masturbation, menstruation, or endless, dreary lists of building materials.
But he spends the better part of the account discoursing upon
light: not illusionistic incandescence pictured within, but illumination that hits the surface from without, a Ryman hallmark that aims to differentiate abstraction as a residual image from the artist's own object-bound marks.
In thinking and talking about complexity, we are faced with the challenge of perceiving and discoursing upon
the different domains of discourse that are involved in the attempt to capture and circumscribe the field in question.
The Arclein blog credits the conceptualization of the Eden Machine to their daily column, and the numerous worldwide participants principally discoursing upon
the ongoing scientific debate over Global Warming and Terraforming the Earth.