Good friends, my Readers, who peruse this Book,
Be not offended, whilst on it you look:
Denude yourself of all depraved affection,
For it contains no badness, nor infection:
‘Tis true that it brings forth to you no birth
Of any value, but in point of mirth;
Thinking therefore how sorrow might your mind
Consume, I could no apter subject find:
One inch of joy surmounts of grief a span;
Because to laugh is proper to the man.

[Amis lecteurs qui ce livre lisez,
Despouillez vous de toute affection.
Et le lisants ne vous scandalisez,
Il ne contient mal ne infection.
Vray est qu’icy peu de perfection
Vous apprendrez, si non en cas de rire.
Aultre argument ne peut mon cueur elire.
Voiant le dueil qui vous mine & consomme,
Mieulx est de ris que de larmes escrire,
Pour ce que rire est le propre de l’homme.
VIVEZ IOYEUX]

François Rabelais (1494-1553) French writer, humanist, doctor

Gargantua and Pantagruel, “To the Readers” (1534-1542) [tr Urquhart/Motteux (1653)]
    (Source)

The work was deemed obscene by the censors of the Collège de la Sorbonne.

(Source (French)). Alternate translations:

My kindly Readers, who this Book begin,
All Prejudice, I pray you, lay aside,
And reading it, find no Offence therein;
In it nor Hurt nor Poison doth abide.
'Tis true that small Perfection here doth hide;
Nought will you learn save only Mirth's Delight;
No other Subject can my Heart indite,
Seeing the Dole that wastes and makes you wan;
'Tis better far of Mirth than Tears to write,
For Laughter is the special Gift to Man.
LIVE MERRILY
[tr. Smith (1893)]

Kind readers, who vouchsafe to cast an eye
On what ensues, all prejudice lay by:
Let not my book your indignation raise;
It means no harm, no poison it conveys.
Except in point of laughing, it is true
Not much 'twill teach you -- it being all my view
To inspire with mirth the hearts of those that moan,
And change to laughter the afflictive groan,
FOR LAUGHTER IS MAN'S PROPERTY ALONE.
[tr. Urguhart/Motteux/Stokes (1905)]

Readers, friends, if you turn these pages
Put your prejudice aside,
For, really, there's nothing here that's outrageous,
Nothing sick, or bad -- or contagious.
Not that I sit here glowing with pride
For my book: all you'll find is laughter:
That's all the glory my heart is after,
Seeing how sorrow eats you, defeats you.
I'd rather write about laughing than crying,
For laughter makes men human, and courageous.
BE HAPPY!
[tr. Raffel (1989)]

You friends and readers of this book, take heed:
Pray put all perturbation far behind,
And do not be offended as you read:
It holds no evil to corrupt the mind;
Though here perfection may be hard to find,
Unless in point of laughter and good cheer;
No other subject can my heart hold dear,
Seeing the grief that robs you of your rest:
Better a laugh to write of than a tear,
For it is laughter that becomes man best.
[tr. Frame (1991)]