My love is lyke to yse, and I to fyre;
how comes it then that this her cold so great
is not dissolv'd through my so hot desyre,
but harder growes the more I her intreat?
Or how comes it that my exceeding heat
is not delayd by her hart frosen cold:
but that I burne much more in boyling sweat,
and feele my flames augmented manifold?
What more miraculous thing may be told
that fire which all things melts, should harden yse:
and yse which is congeald with senceless cold,
should kindle fyre by wonderfull devyse.
Such is the powre of love in gentle mind,
that it can alter all the course of kynd.
He’s marveling at the unbelievable–“miraculous”–fact that her “cold” rejection is inflaming his intense desire for her, while his intense desire is hardening her rejection. 
 (It’s not so miraculous, Ed!) 

Amoretti: Sonnet 30