The Greeks had
“the beard of Zeus”
and He-man had
“the power of Grayskull,”
but on what can I,
in my Judaeo-Christian society,
call as witness to my oath?
By the beard of Grayskull
I swear to strive,
purposely leaving the object-
of-my-striving unsaid,
so as not to limit myself
by troublesome specifics
the sieve and the sand 
As God is my witness………………………………
i usually go with “by the gird of my loins.”
by the height of the loins which i have girded…
by the strength of the power of the loins which I bear