To trace the development of mind from earliest times ... requires ... not a categorical concept, but a functional one.... The most promising operational principle for this purpose is the principle of individuation.

Most new discoveries are suddenly-seen things that were always there.

Music is 'significant form,' and its significance is that of a symbol, a highly articulated, sensuous object, which by virtue of its dynamic structure can express the forms of vital experience which language is peculiarly unfit to convey. Feeling, life, motion and emotion constitute its import.

the wide discrepancy between reason and feeling may be unreal; it is not improbable that intellect is a high form of feeling - a specialized, intensive feeling about intuitions.

common sense is a very tricky instrument; it is as deceptive as it is indispensable.

Fire is a natural symbol of life and passion, though it is the one element in which nothing can actually live.

To trace the development of mind from earliest times ... requires ... not a categorical concept, but a functional one.... The most promising operational principle for this purpose is the principle of individuation.