Pleasure is the first good and natural to us！
伊壁鸠鲁《论快乐》
快乐对于我们来说是至善至真的，正因为此，我们并不选择每一种快乐，而是偶尔放弃多种快乐，因为这些快乐可能会带来更大的不快；同样我们认为有许多痛苦优于快乐，因为当我们长期忍受痛苦之后，更大的快乐便会随之而来。就其与我们的自然联系而言，每一种快乐都是好的，然而并非每一种快乐都是可取的；同理，虽然每一种痛苦都是不好的，但并非每一种痛苦从本质上都应当为我们所驱避。不过，依据某种鉴别的尺度，通过权衡利弊我们必须形成对全部事物的判断。因此我们有时总是将好事视为坏事，反之将坏事视为好事。快乐没有本来就是坏的，但是有些快乐的产生者却带来了比快乐大许多倍的烦扰。
Since pleasure is the first good and natural to us, for this very reason we do not choose every pleasure, but sometimes we pass over many pleasure, when greater discomfort accrues to us as the result of them: and similarly we think many pains better than pleasures, since a greater pleasure comes to us when we have endured pains for a long time. Every pleasure then because of its natural kinship to us is good, yet not every pleasure is to be chosen; even as every pain also in an evil, yet not all are always of a nature to be avoided. Yet by a scale of comparison and by the consideration of advantages and disadvantages we must form our judgment on all these matters. For the good on certain occasions we treat as bad, and conversely the bad as good.
