It was once believed that 7 and 9, with their multiples, were
critical points in life; and 63, which is produced by multiplying 7 and
9 together, was termed the Grand Climacteric, which few persons
succeeded in outliving.
“There are two years, the seventh and the ninth, that commonly bring
great changes in a man's life, and great dangers; wherefore 63, that
contains both these numbers multiplied together, comes not without
heaps of dangers.” —Levinus Lemnius.
are seventh and ninth, with their multiples by the odd numbers 3,
5, 7, 9- viz. 7, 9, 21, 27, 35, 45, 49, 63, and 81, over which
astrologers supposed Saturn, the malevolent planet, presided.
Hippocrates recognises these periods. (See
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894
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