Pain itself is merely a consequence of the desire for pleasure, the desire t destroy, to annihilate; in its supreme form, pain is a variety of pleasure.

Pleasure, or pain, is not only good, or evil, in itself, but the measure of what is good or evil, in every object of desire or aversion; for the ultimate reason why we pursue one thing, and avoid another, is because we expect pleasure from the former, and apprehend pain from the latter. If we sometimes decline a present pleasure, it is not because we are averse to pleasure itself, but because we conceive, that in the present instance, it will be necessarily connected with a greater pain. In like manner, if we sometimes voluntarily submit to a present pain, it is because we judge that it is necessarily connected with a greater pleasure.

The inextricable way pleasure and pain are mixed up with each other in this world is a mournful fact to beings who are all the time striving for pleasure alone. In the ideal world there is no pain, no misery. There is nothing but happiness. But in our world pain seems to have been the original feeling, the first one to appear in the evolution of sentiency. Pleasure is a sort of after-thought, a secondary attribute of consciousness which developed later as an aid to pain in keeping living beings straight. Pain is a whip, a penalty. Pleasure is a reward or bribe. Pain is a curse. We are all the time trying to minimize and escape it. In an ideal world the inhabitants never have any impulses that drive them to improper acts. All their impulses are good. Every act is proper and right. Ideal beings need only to live and act in order to be happy. We are not ideal beings. Our world happens to be one affording almost unlimited opportunities for improvement.

There is a pleasure which is born of pain.

So if you can look at all things without allowing pleasure to creep in - at a face, a bird, the colour of a sari, the beauty of a sheet of water shimmering in the sun, or anything that gives delight - if you can look at it without wanting the experience to be repeated, then there will be no pain, no fear, and therefore tremendous joy. It is the struggle to repeat and perpetuate pleasure which turns it into pain. Watch it in yourself. The very demand for the repetition of pleasure brings about pain, because it is not the same, as it was yesterday. You struggle to achieve the same delight, not only to your aesthetic sense but the same inward quality of the mind, and you are hurt and disappointed because it is denied to you.

Pleasure wouldn’t exist without the sharp bite of pain. Even the brief flash of orgasm is too intense to be absolutely pleasurable

How singular is the thing called pleasure, and how curiously related to pain, which might be thought to be the opposite of it; for they never come to a man together, and yet he who pursues either of them is generally compelled to take the other. They are two, and yet they grow together out of one head or stem.

If we are to have intense pleasures, we must also be liable to intense pains. The pleasure we love, and the pain we hate, but it seems impossible to have the former without the latter. Indeed, it looks as if the two must in some way alternate, for continuous pleasure is a stimulus that must either pall or be increased. And the increase will either harden the sense buds with its friction, or turn into pain. A consistent diet of rich food either destroys the appetite or makes one sick.

My experience is that everything is bliss. But the desire for bliss creates pain. Thus bliss becomes the seed of pain. The entire universe of pain is born of desire. Give up the desire for pleasure and you will not even know what is pain. (…) for the sake of pleasure you are committing many sins. And the fruits of sin are suffering and death.

[P]leasure is in itself a good; nay, even setting aside immunity from pain, the only good: pain is in itself an evil; and, indeed, without exception, the only evil; or else the words good and evil have no meaning. And this is alike true of every sort of pain, and of every sort of pleasure.

In general, then, pleasure is not good, because every pleasure is a perceptible process of coming into its nature; but no coming-into-being belongs to the same class as the ends we pursue — for

What a strange thing that which men call pleasure seems to be, and how astonishing the relation it has with what is thought to be its opposite, namely pain! A man cannot have both at the same time. Yet if he pursues and catches the one, he is almost always bound to catch the other also, like two creatures with one head.

Pleasure is never as pleasant as we expected it to be and pain is always more painful. The pain in the world always outweighs the pleasure. If you don't believe it, compare the respective feelings of two animals, one of which is eating the other.

Pleasure limits the scope of human possiblity-the pleasure principle is a principle of homeostasis. Desire, on the other hand, finds its boundary, its strict relation, its limit, and it is in the relation to this limit that it is sustained as such, crossing the threshold imposed by the pleasure principle.