Every one has his own interests

A dog wants nothing but bones, like a man wants gold.

Bones for dogs are as gold for men.

No universal 'good' exists at all.

So, there is no objective meanings in chasing 'good'. A ratioanl man does not pursue 'good'.

What we conventionally refer to as 'good' actually are 'common interests'.

In this sense, there are two kinds of 'good': individual 'good' and social 'good'.

The former varies from one to another. The latter, as it is defined, are common.

One pursues not 'good' but only his own interests, unless his own interests overlap with others'.

Whatever I do manifest my own interests. Because, what I do is what i want to do, What I speak is what i want to speak.