Literal
Khayam, if you are intoxicated with wine, enjoy!
If you are seated with a lover of thine, enjoy!
In the end, the Void the whole world employ
Imagine thou art not, while waiting in line, enjoy!
Meaning:
In life devote yourself to joy and love
Behold the beauty of the peaceful dove
Those who live, in the end must all perish
Live as if you are already in heavens above.
Fitzgerald:
And if the Wine you drink, the Lip you press,
End in the Nothing all Things end in–Yes-
Then fancy while Thou art, Thou art but what
Thou shalt be–Nothing–Thou shalt not be less.
– Omar Khayyam