Can anyone please let me know the meaning of the following lines taken from Edward Albee's play Three Tall Women. The lines are spoken by character A, an elderly woman, expressing her view of the "happiest moment" of the life which she means to be the time of death. My problem is particularly with the part specified in bold.
"Coming to the end of it, I think, when all the waves cause the greatest woes to subside, leaving breathing space, time to concentrate on the greatest woe of all—that blessed one—the end of it"