Some classical sources:
carpe diem, quam minimum credula postero.
Horace (65-8, bce), Ode 1.9
(pluck the day, putting as little trust as possible in tomorrow!)
Catullus (84-54 bce), Carmen 5
Let us live, my Lesbia, let us love,
and all the words of the old, and so moral,
may they be worth less than nothing to us!
Suns may set, and suns may rise again:
but when our brief light has set,
night is one long everlasting sleep.
Give me a thousand kisses, a hundred more,
another thousand, and another hundred,
and, when we’ve counted up the many thousands,
confuse them so as not to know them all,
so that no enemy may cast an evil eye,
by knowing that there were so many kisses.
Shakespeare's Sonnets:
When I consider every thing that grows
Holds in perfection but a little moment,
That this huge stage presenteth nought but shows
Whereon the stars in secret influence comment;
When I perceive that men as plants increase,
Cheered and cheque'd even by the self-same sky,
Vaunt in their youthful sap, at height decrease,
And wear their brave state out of memory;
Then the conceit of this inconstant stay
Sets you most rich in youth before my sight,
Where wasteful Time debateth with Decay,
To change your day of youth to sullied night;
And all in war with Time for love of you,
As he takes from you, I engraft you new.
But wherefore do not you a mightier way
Make war upon this bloody tyrant, Time?
And fortify yourself in your decay
With means more blessed than my barren rhyme?
Now stand you on the top of happy hours;
And many maiden gardens, yet unset
With virtuous wish would bear your living flowers,
Much liker than your painted counterfeit:
So should the lines of life that life repair,
Which this (Time's pencil, or my pupil pen),
Neither in inward worth nor outward fair,
Can make you live yourself in eyes of men.
To give away yourself keeps yourself still,
And you must live, drawn by your own sweet skill.
Robert Herrick:
Gather ye rose-buds while ye may,