"the intensity, glory, and absolute assuredness if my mind's flight made it very difficult for me to believe once i was better, that the illness was one i should willingly give up....moods are such an essential part of the substance of life, of one's notion of oneself, that even psychotic extremes in mood and behavior somehow can be seen as temporary, even understandable reactions to what life has dealt....even though the depressions that inevitably followed nearly cost me my life."

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Progress, far from consisting in change, depends on retentiveness. When change is absolute there remains no being to improve and no direction is set for possible improvement: and when experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it. In the first stage of life the mind is frivolous and easily distracted; it misses progress by failing in consecutiveness and persistence. This is the condition of children and barbarians, in which instinct has learned nothing from experience.

— George Santayana