To speke upon Mathematique,
Which grounded is on Theorique.
The science of Astronomie
I thinke forto specefie,
Withoute which, to telle plein,
Alle othre science is in vein[988]
Toward the scole of erthli thinges:
For as an Egle with his winges 630
Fleth above alle that men finde,
So doth this science in his kinde.