Yesterday is history.
Tomorrow is mystery.
Today is a gift.
That's why it is called the present.
アメリカの作家、アリス・モース・アール（Alice Morse Earle）の言葉。
日時計を研究した著書
Sun Dials and Roses of Yesterday:
Garden Delights Which Are Here Displayed In Very Truth And Are Moreover Regarded As Emblems (1902)
の中の一節。
How will I spend the present day, today -this gifted time-
for make it the sweetest one?
Anne-my lifelong friend- said
"I believe the nicest and sweetest days are not those
on which anything very splendid or wonderful or exciting happens,
but just those that bring simple little pleasures,
following one another softly, like pearls slipping off a string."
