Changes

<blockquote>We realize that what distinguishes a [[conscious ]] [[idea ]] from a [[preconscious ]] one, and this from an [[unconscious ]] one, cannot be anything but a modification, or perhaps also [[another ]] distribution, of [[psychic ]] [[energy]]. We [[speak ]] of [[cathexes ]] and hypercathexes, but beyond this we [[lack ]] all [[knowledge ]] and even a beginning for a useful [[working ]] hypothesis.<ref>{{M&M}} Part III, Section I</ref></blockquote>

<blockquote>On falling asleep the "undesired ideas" emerge, owing to the slackening of a certain [[arbitrary ]] (and, of course, also critical) [[action]], which is allowed to influence the trend of our ideas; we are accustomed to speak of fatigue as the [[reason ]] of this slackening; the emerging undesired ideas are changed into [[visual ]] and auditory [[images]]. In the condition which is utilized for the [[analysis ]] of [[dreams ]] and pathological ideas, this [[activity ]] is purposely and deliberately renounced, and the [[psychic energy ]] thus saved (or some part of it) is employed in attentively tracking the undesired [[thoughts ]] which now come to the surface-thoughts which retain their [[identity ]] as ideas (in which the condition differs from the [[state ]] of falling asleep). ''"Undesired ideas" are thus changed into "desired" ones'' .... The "undesired ideas" habitually evoke the most violent [[resistance]], which seeks to prevent [[them ]] from coming to the surface.<ref>{{IoD}} Ch. 2</ref></blockquote>