carpe diem

carpe diem (kär`pĕ dē`ĕm), a descriptive term for literature that urges readers to live for the moment [from the Latin phrase "seize the day," used by Horace]. The theme, which was widely used in 16th- and 17th-century love poetry, is best exemplified by a familiar stanza from Robert Herrick's "To the Virgins, to Make Much of Time":

Gather ye rosebuds while ye may,
Old time is still a-flying;
And this same flower that smiles today
Tomorrow will be dying.

Shakespeare's version of the theme takes the following form in Twelfth Night:

What is love? 'Tis not hereafter;
Present mirth has present laughter;
  What's to come is still unsure.
In delay there lies no plenty,
Then come and kiss me sweet and twenty;
  Youth's a stuff will not endure.