Maybe it’s my mood, but perhaps the theme is accepting death.

The writer approaches death ( to go = to die) he addresses Life itself – his sweetest love.

He life was wonderful (none fitter).

Dying, he will not be too serious about his death.

The last line bewilders me.

Maybe as he lays dying, he pretends he has passed and as a friend or relative may approach him in despair, he jumps up and shouts “oogley-boogley”.

A comic’s well received act is said to ‘Kill’.

Added: This is from the poem “Song” By John Donne. (1572-1631) and it is a love poem.

” Donne tells his love that he’s not leaving her because he is tired of her or because he thinks he may find something better, he’s leaving because he has a duty to perform but if she thinks he may be killed it’s better for her if he pretends that he’s dead. “But since that I Must die at last, ‘tis best, To use myself in jest Thus by feigned deaths to die.” His lie is to pretend that he’s going to die. ”

http://www.jiskha.com/english/literary_terms/song_vs_sonnet.html

This poet is going to leave, we get that idea right away, because he/she is making excuses about it already, to their “sweetest love.” The poet’s not tired (no “weariness” there) of that love, and he doesn’t think the world will provide him with a better love, a “fitter love,” but…

the poet thinks that he and his love “must die at last,” or in other words that the love will surely die, if not by knowledge of each other then by the separation of death itself…

so he figures ” ’tis best” to love “in jest,” or without being serious and getting married and all that…

“thus by feigned deaths to die.” so I guess the poet will pretend to love several others, in “feigned deaths,” in order to spare his true love any feelings of overwhelming grief when he dies or gets bored with her. How noble! (Pretty silly of that poet, too, huh?)

Of course poetry in particular is very open to individual interpretation, and you should make your own judgment…but this is mine, since “that I must die at last”… lol, or is it cbc? :-}

Helpful?