Extract from Thomas De Quincey, Confessions of an English Opium Eater:
The minutest incidents of childhood, or forgotten scenes of later years, were often revived: I could not be said to recollect them, for if I had been told of them when waking, I should not have been able to acknowledge them as parts of my past experience. But placed as they were before me, in dreams like intuitions, and clothed in all their evanescent circumstances and accompanying feelings, I RECOGNISED them instantaneously. I was once told by a near relative of mine, that having in her childhood fallen into a river, and being on the very verge of death but for the critical assistance which reached her, she saw in a moment her whole life, in its minutest incidents, arrayed before her simultaneously as in a mirror; and she had a faculty developed as suddenly for comprehending the whole and every part. This, from some opium experiences of mine, I can believe; I have indeed seen the same thing asserted twice in modern books, and accompanied by a remark which I am convinced is true; viz., that the dread book of account which the Scriptures speak of is in fact the mind itself of each individual. Of this at least I feel assured, that there is no such thing as FORGETTING possible to the mind; a thousand accidents may and will interpose a veil between our present consciousness and the secret inscriptions on the mind; accidents of the same sort will also rend away this veil; but alike, whether veiled or unveiled, the inscription remains for ever, just as the stars seem to withdraw before the common light of day, whereas in fact we all know that it is the light which is drawn over them as a veil, and that they are waiting to be revealed when the obscuring daylight shall have withdrawn.