Since she whom I lov'd hath payd her last debt
To Nature, and to hers, and my good is dead,
And her Soule early into heaven ravished,
Wholly on heavenly things my mind is sett.
Here the admyring her my mind did whett
To seeke thee God; so streames do shew their head;
With her death at 33 years old, his wife’s soul was taken up into heaven too early–it was premature in that she was so young and sudden and unexpected given the circumstances of her death in childbirth and not by some long or wasting illness. 
 The choice of the word “ravished” carries several implications–to seize and carry off by force, to carry off or rape a woman by force. Donne often uses the langauge of physical assault and force to describe God’s ability to irrevocably alter our lives. 
 Death does not give us the option to escape–it is essentially a kidnapping from this life.  Secondly, there is the sense that is used in the descriptions of Saints being enraptured or in ecstasy at the moment entry into Heaven or a revelation of Divine Truth.
Since she whom I lovd hath payd her last debt Holy Sonnet XVII