"The free development of individualities, and hence not the reduction of necessary labor time so as to posit surplus labor, but rather the general reduction of the necessary labor of society to a minimum, which then corresponds to the artistic, scientific etc. development of the individuals in the time set free, and with the means created, for all of them."1
"[Capital] is thus, despite itself, instrumental in creating the means of social disposable time, in order to reduce labor time for the whole society to a diminishing minimum, and thus to free everyone's time for their own development." 708
"[R]eal wealth is the developed productive power of all individuals. The measure of wealth is then not any longer, in any way, labor time, but rather disposable time." 708
"Free time -- which is both idle time and time for higher activity -- has naturally transformed its possessor into a different subject, and he then enters into the direct production process as this different subject." 712
Note: Capital, through technical development (automation, etc.), reduces to a minimum that portion of the day which we work for ourselves, in order to maximize that portion in which we work, uncompensated, for others (the for-profit employer). That portion in which we work for ourselves -- for our own subsistence or "reproduction," so that we may from our employer's perspective return to work the next day, week, and so on; or, from our own view, in order to live -- Marx calls "necessary labor time." The idea here is that if capitalism's development drives down, by means of technological advance, that portion of the day that people need to work in order to meet their own needs, then it is simultaneously creating the possibility that people would stop working, uncompensated, for others, for the "surplus" portion of their working time. This time, in turn, would become their own: "Free time -- which is both idle time and time for higher activity … transform[s] its possessor into a different subject … [who] then enters into the direct production process as this different subject."