How could he explain beauty, or music, or art, to this . . . this matriarchal savage? How explain cerise to a man born blind? And above all, who had … - E.E. "Doc" Smith

There has always been, and will always be, the problem of surviving the experience that any trained expert can handle ... when there hasn't been any first survivor to become an expert.

The witnesses may be excused. Truth is the only thing of importance here, and witnesses, being human and therefore frail, obstruct truth more frequently than they further its progress.

They did not ask him why he wanted that data. They may have wondered at his temerity in daring to scout alone a fortress whose strength had kept at bay the massed Patrol forces of the sector, but if they did so they kept their thoughts well screened. For this was a Gray Lensman, and very evidently a super–powered individual, even of that select group whose weakest members were powerful indeed.