insight

"You are young yet‥but the time will arrive when you will learn to judge for yourself. 

‥Believe nothing you hear, and only one half that you see."
 (1845 E. A. Poe in Graham's Mag. Nov. 194)

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"My principal feeling, about this time, was an unsatiable longing for something that I cannot describe or denominate properly, unless I say it was for utter oblivion that I longed. I desired to sleep; but it was for a deeper and longer sleep that in which the senses were nightly stepped. I longed to be at rest and quiet, and close my eyes on the past and future alike, as far as this frail life was concerned." 

(James Hogg - Confessions of a Justified Sinner)