Fly, O Bird! I allow adventure
Of mighty lands and snowy hillocks.
Beautiful heavens amazingly add
To the treasure.
Soon thou'lt to nation your own, fly,
Breaking all my desires,
Rendering ***** void.
It's called Piphilology wherein the number of digits in each word is equal to the corresponding digit of Pi (mathematical constant). Those were the first 33 digits of Pi, the 33rd being 0 which is represented by the word 'void'.
The digits are - 3.14159265358979323846264338327950...
