Rational: The rational is the reasonable, that
which accords with reason. I conceive reason as an
attitude whose principle is to shape thought, feeling, and
action in accordance with objective values. Objective
values are established by the average experience of
external facts on the one hand, and of inner psychological
facts on the other. Such experiences, however, could
represent no objective 'value', if 'valued' as such by the
subject; for this would already amount to an act of reason.
But the reasoning attitude, which permits us to declare as
valid objective values in general, is not the work of the
individual subject, but the product of human history.