Analysis of Sonnet LI

DOe I not see that fayrest ymages
Of hardest Marble are of purpose made?
for that they should endure through many ages,
ne let theyr famous moniments to fade.
Why then doe I, vntrainde in louers trade,
her hardnes blame which I should more co[m]mend?
sith neuer ought was excellent assayde,
which was not hard t'atchiue and bring to end.
Ne ought so hard, but he that would attend,
mote soften it and to his will allure:
so doe I hope her stubborne hart to bend,
and that it then more stedfast will endure.
Onely my paines wil be the more to get her,
but hauing her, my ioy wil be the greater.