We wish to be happier than other people; and this is difficult, for we believe others to be happier than they are.
If one only wished to be happy, this could be easily accomplished; but we wish to be happier that other people, and this is always difficult, for we believe others to be happier than they are.
If we only wanted to be happy, it would be easy; but we want to be happier than other people, and that is almost always difficult, since we think them happier than they are