"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium 
doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore 
veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim 
ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia 
consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque 
porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, 
adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et
dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis 
nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid 
ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea 
voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem 
eum fugiat quo voluptas nulla pariatur?"

1914 translation by H. Rackham
"But I must explain to you how all this mistaken idea of denouncing pleasure 
and praising pain was born and I will give you a complete account of the system,
and expound the actual teachings of the great explorer of the truth, the
master-builder of human happiness. No one rejects, dislikes, or avoids pleasure
itself, because it is pleasure, but because those who do not know how to 
pursue pleasure rationally encounter consequences that are extremely painful. 
Nor again is there anyone who loves or pursues or desires to obtain pain of 
itself, because it is pain, but because occasionally circumstances occur in 
which toil and pain can procure him some great pleasure. To take a trivial
example, which of us ever undertakes laborious physical exercise, except to
obtain some advantage from it? But who has any right to find fault with a man
who chooses to enjoy a pleasure that has no annoying consequences, or one who 
avoids a pain that produces no resultant pleasure?"

Section 1.10.33 of "de Finibus Bonorum et Malorum", written by Cicero in 45 BC
"At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis
praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias
excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui
officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum 
quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum 
soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime 
placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Temporibus autem quibusdam et aut officiis debitis aut rerum necessitatibus 
saepe eveniet ut et voluptates repudiandae sint et molestiae non recusandae. 
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis 
voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat."

1914 translation by H. Rackham
"On the other hand, we denounce with righteous indignation and dislike men 
who are so beguiled and demoralized by the charms of pleasure of the moment, 
so blinded by desire, that they cannot foresee the pain and trouble that are 
bound to ensue; and equal blame belongs to those who fail in their duty through
weakness of will, which is the same as saying through shrinking from toil 
and pain. These cases are perfectly simple and easy to distinguish. In a free
hour, when our power of choice is untrammelled and when nothing prevents our 
being able to do what we like best, every pleasure is to be welcomed and every
pain avoided. But in certain circumstances and owing to the claims of duty or
the obligations of business it will frequently occur that pleasures have to be 
repudiated and annoyances accepted. The wise man therefore always holds in 
these matters to this principle of selection: he rejects pleasures to secure 
other greater pleasures, or else he endures pains to avoid worse pains."