A holy riddle

I really think scientists need to find
an answer to this question
Which’ll let you down first, your body or your mind?
Well this is my suggestion.

Calculate the capability of each at our prime
Devise an equation
Brawn over brain less damage over time
Use differentiation.

Here are other methods though that I have found:
Finger in the air to test the wind’s direction.
Do the Hokey Cokey and you turn around.
Something involving metal detection.

Sharper minds than mine is
with bods like gods or goddesses
Couldn’t wrestle with the logic
of the holy riddle this mess is.