My object in this treatise is to examine into the real nature of the
Interest of Capital, for the purpose of proving that it is lawful, and
explaining why it should be perpetual. This may appear singular, and
yet, I confess, I am more afraid of being too plain than too obscure. I
am afraid I may weary the reader by a series of mere truisms. But it is
no easy matter to avoid this danger, when the facts with which we have
to deal are known to every one by personal, familiar, and daily
experience.

But, then, you will say, "What is the use of this treatise? Why explain
what everybody knows?"

But, although this problem appears at first sight so very simple, there
is more in it than you might suppose. I shall endeavour to prove this by
an example. Mondor lends an instrument of labour to-day, which will be
entirely destroyed in a week, yet the capital will not produce the less
interest to Mondor or his heirs, through all eternity. Reader, can you
honestly say that you understand the reason of this?

It would be a waste of time to seek any satisfactory explanation from
the writings of economists. They have not thrown much light upon the
reasons of the existence of interest. For this they are not to be
blamed; for at the time they wrote, its lawfulness was not called in
question. Now, however, times are altered; the case is different. Men,
who consider themselves to be in advance of their age, have organised an
active crusade against capital and interest; it is the productiveness of
capital which they are attacking; not certain abuses in the
administration of it, but the principle itself.