I sent my Soul through the Invisible,
Some letter of that After-life to spell:
And by and by my Soul return’d to me,
And answer’d “I Myself am Heav’n and Hell:” - Omar Khayyam
Rubaiyat of Omar Khayyam - Rendered into English Verse by Edward Fitzgerald

Ah! my Beloved, fill the Cup that clears
TO-DAY of past Regrets and future Fears-
To-morrow?—Why, To-morrow I may be
Myself with Yesterday’s Sev’n Thousand Years. - Omar Kahyyam