O Helicanus, strike me, honored sir

O Helicanus, strike me, honored sir,
Give me a gash, put me to present pain,
Lest this great sea of joys rushing upon me
O'erbear the shores of my mortality,
And drown me with their sweetness. O, come hither,
Thou that beget'st him that did thee beget;
Thou that wast born at sea, buried at Tharsus,
And found at sea again! O Helicanus,
Down on thy knees, thank the holy gods as loud
As thunder threatens us. This is Marina.
What was thy mother's name? Tell me but that,
For truth can never be confirm'd enough,
Though doubts did ever sleep.