Pleasure may come from illusion, but happiness can come only of reality.

Pleasure can be supported by an illusion; but happiness rests upon truth.

Pleasure only starts once the worm has got into the fruit, to become delightful happiness must be tainted with poison.

When, therefore, we maintain that pleasure is the end, we do not mean the pleasures of profligates and those that consist in sensuality, as is supposed by some who are either ignorant or disagree with us or do not understand, but freedom from pain in the body and from trouble in the mind. For it is not continuous drinkings and revelings, nor the satisfaction of lusts, nor the enjoyment of fish and other luxuries of the wealthy table, which produce a pleasant life, but sober reasoning, searching out the motives for all choice and avoidance, and banishing mere opinions, to which are due the greatest disturbance of the spirit.

People argue themselves out of their pleasures

..there is more to life than just pleasure. We want to achieve our happiness and not just experience it.