love, are in every other respect temperamentally different.
This becomes apparent when the illusion wears off, as it necessarily
must.

Accordingly, people who marry for love are generally unhappy, for such
people look after the welfare of the future generation at the expense of
the present. _Quien se casa por amores, ha de vivir con dolores_ (He who
marries for love must live in grief), says the Spanish proverb.
Marriages _de convenance_, which are generally arranged by the parents,
will turn out the reverse. The considerations in this case which control
them, whatever their nature may be, are at any rate real and unable to
vanish of themselves. A marriage of this kind attends to the welfare of
the present generation to the detriment of the future, it is true; and
yet this remains problematical.

A man who marries for money, and not for love, lives more in the
interest of the individual than in that of the species; a condition
exactly opposed to truth; therefore it is unnatural and rouses a certain
feeling of contempt. A girl who against the wish of her parents refuses
to marry a rich man, still young, and ignores all considerations of
_convenance_, in order to choose another instinctively to her liking,
sacrifices her individual welfare to the species. But it is for this
very reason that she meets with a certain approval, for she has given
preference to what was more important and acted in the spirit of nature
(of the species) more exactly; while the parents advised only in the
spirit of individual egoism.

As the outcome of all this, it seems that to marry means that either the
interest of the individual or the interest of the species must suffer.
As a rule one or the other is the case, for it is only by the rarest and
luckiest accident that _convenance_ and passionate love go hand in hand.
The wretched condition of most persons physically, morally, and
intellectually may be partly accounted for by the fact that marriages
are not generally the result of pure choice and inclination, but of all
kinds of external considerations and accidental circumstances. However,
if inclination to a certain degree is taken into consideration, as well
as convenience, this is as it were a compromise with the genius of the
species. As is well known, happy marriages are few and far between,
since marriage is intended to have the welfare of the future generation
at heart and not the present.

However, let me add for the consolation o