question : Yes, Sappho and Phaon are we!

[mac_ad]

i've read everything that pertains to this reference i can think of, but truly what does this full quote mean? and is it quoted by him from another source?
this is something i have to figure out due to an online alternate reality game lol, so any help would be great!

“Yes, Sappho and Phaon are we!
But one grief is weighing on me.
You don't know your way to the sea!”

???????????

[Logos]

It occurs in Chapter 52 of our online text, about halfway down the page:

http://www.online-literature.com/dostoevsky/brothers_karamazov/52/

I think if you at least read that chapter you will get the context, then you can check this out :)

http://etext.virginia.edu/britpo/sappho/sappho.html
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[mac_ad]

thank you so much! I have read it before, and reviewing it now, i know sappho threw herself into the waves because of her love for phaon, but what i cant understand is the meaning, of "But one grief is weighing on me. You don't know your way to the sea!" i dont know 'who' doesnt know the way.. i know its remedial, but in my other task its actually quite important to figure this part out.. i dont know if its the reader, sappho, or phaon, or all of us who dont know our way to the sea, and i dont understand if it pertains to dying in the sea, or sailing the sea once the sea is found..
if any of that makes sense lol
but thank you for what youve given me thus far!