quickness of perception

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There is a quickness of perception in some, a nicety in the discernment of character, a natural penetration, in short, which no experience in others can equal, and Lady Russell had been less gifted in this part of understanding than her young friend.
Such quickness of perception as this was not to be deceived; such fearless candor demanded as a right a similar frankness on my side.
At last it seemed to him that one part of the wall gave forth a more hollow and deeper echo; he eagerly advanced, and with the quickness of perception that no one but a prisoner possesses, saw that there, in all probability, the opening must be.
Another had such quickness of perception that he counted all the separate motions of an elastic body, while it was springing backward and forward at the rate of nine hundred millions of times in a second.
Her temper being naturally good, she was never violent or morose, but from constant indulgence, and habitual scorn of reason, she was often testy and capricious; her mind had never been cultivated: her intellect, at best, was somewhat shallow; she possessed considerable vivacity, some quickness of perception, and some talent for music and the acquisition of languages, but till fifteen she had troubled herself to acquire nothing;--then the love of display had roused her faculties, and induced her to apply herself, but only to the more showy accomplishments.
But, although she was in no small degree delighted by this discovery, which reflected so much credit on her own quickness of perception, it did not lessen her motherly anxiety in Kate's behalf; and accordingly, with a vast quantity of trepidation, she quitted her own box to hasten into that of Mrs Wititterly.