Analysis of Sonnet LXXXVIII

SInce I haue lackt the comfort of that light,
The which was wont to lead my thoughts astray:
I wander as in darkenesse of the night,
affrayd of euery dangers least dismay.
Ne ought I see, though in the clearest day,
when others gaze vpon theyr shadowes vayne:
but th'onely image of that heauenly ray,
whereof some glance doth in mine eie remayne.
Of which beholding th'Idaea playne,
throgh contemplation of my purest part:
with light thereof I doe my selfe sustayne,
and thereon feed my loue-affamisht hart.
But with such brightnesse whylest I fill my mind,
I starue my body and mine eyes doe blynd.