Happy the Man

(Found here)

Happy the man, and happy he alone,
    He who can call today his own:
    He who, secure within, can say,
Tomorrow do thy worst, for I have lived today.
    Be fair or foul or rain or shine
The joys I have possessed, in spite of fate, are mine.
Not Heaven itself upon the past has power,
But what has been, has been, and I have had my hour.

~John Dryden