From Buddha's Ancient Path...

The Venerable Sariputta addressing the monks said: `It is Nibbana, friends, that is happiness; it is Nibbana, friends, that is happiness.'Then the Venerable Udayi asked: `But what, friend Sariputta, is happiness, since herein there is no feeling?' `Just this, friend, is happiness, that herein there is no feeling.' 30 This saying of the Venerable Sariputta is fully supported by the following one of the Buddha: `Whatever is experienced, sensed felt, all that is suffering' (yamkinci vedayitam tam dukkhasmim ti)
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Pleasures are like poppies spread,
You seize the flower, its bloom is shed;
Or, like the snow fall on the river,
A moment white, then melts for ever.
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Man is always attracted by the pleasant and the delightful, and in his search for pleasure, he runs after the five kinds of sense objects; cognizes ideas and clings to them. He little realizes that no amount of forms, sounds, smells, tastes, tangibles and mental objects or ideas will ever satisfy the eye, ear, nose, tongue, body and mind. Beings in their intense thirst for either possession or the satisfaction of desires, become bound to the wheel of existence, are twisted and torn between the spokes of agony, and securely close the door to final deliverance. The Buddha was most emphatic against this mad rush, and warned:

Pleasure is a bond, a joy that's brief,
Of little taste, leading to drawn-out pain.
The wise know that the hook is baited.