And he said, 'Your pain is the breaking of the shell that encloses your understanding. Even as the stone of the fruit must break, that its heart may stand in the sun, so must you know pain.

~ Khalil Gibran.

No kind of sensation is keener and more active than pain; it's impressions are unmistakable.

~ Marquis de Sade.

How blessed am I in this discovering thee / To enter in these bonds is to be free.

~ John Donne.

If ever thou be'st bound in thy scarf and beaten, thou shalt find what it is to be proud of thy bondage.

~ William Shakespeare.

You have to get past the pleasure stage, until you reach the stage of tears.

~ Pauline Reage.

One must do violence to the object of one's desire; when it surrenders, the pleasure is greater.

~ Marquis de Sade.