our perception of time is the eternal Now
    we do not see the past or know the future
        regretting the past
        fearing the future
cyclic time
    spiral or helix
    blink
    breathe
    days
    month / lunar / menstrual
    seasons
    year / solar
    life
    civilizations
    ages
metaphors of time
    the circle of time
        emphasizes cyclic time
    the river of time
        more linear
    fan-shaped
    tree-shaped
        roots, trunk & branches
seasonal
    2 seasons
        summer / winter
        wet / dry
    4 seasons
        spring / summer / fall / winter
solar
    solstices
        mid-winter [shortest day]
        mid-summer [longest day]
    equinoxes
        equal day & night
        vernal
            spring
        autumnal
            fall
    weather lags solar by 6 weeks
lunar
    lunar month
        29 1/2 days
    Metonic cycle
        Meton [Greek / Athens]
        19 years / 235 lunar months
        the Moon's phases recur on the same days of the solar year
    Callipic cycle
        Calippus [Greek / Athens]
        4 Metonic cycles / 940 lunar months
        a period of 76 years, at the end of which, by omission of one day, the phases of
            the moon recur at the same day and hour
    Hipparchic cycle
        Hipparchus [Greek]
        4 Callipic cycles minus 1 day / 3760 lunar months
axial precession
    26,000 years
Joseph Campbell
    eternal
        outside time
        everlasting [a very long time] is not eternal
    time shuts out the eternal
    discrimination separating the eternal from the temporal
Alteringa [Aboriginal]
    the dream time
    eternal
    ever-present