There are many persons who are trained to be strictly honorable in
regard to one particular matter, while they have little honor to boast
of in anything else. Many a man, for instance, will not steal your
money; but he will lay hands on everything of yours that he can enjoy
without having to pay for it. A man of business will often deceive you
without the slightest scruple, but he will absolutely refuse to commit
a theft.

Imagination is strong in a man when that particular function of the
brain which enables him to observe is roused to activity without
any necessary excitement of the senses. Accordingly, we find that
imagination is active just in proportion as our senses are not excited
by external objects. A long period of solitude, whether in prison or
in a sick room; quiet, twilight, darkness--these are the things that
promote its activity; and under their influence it comes into play of
itself. On the other hand, when a great deal of material is presented
to our faculties of observation, as happens on a journey, or in
the hurly-burly of the world, or, again, in broad daylight, the
imagination is idle, and, even though call may be made upon it,
refuses to become active, as though it understood that that was not
its proper time.

However, if the imagination is to yield any real product, it must have
received a great deal of material from the external world. This is
the only way in which its storehouse can be filled. The phantasy is
nourished much in the same way as the body, which is least capable
of any work and enjoys doing nothing just in the very moment when it
receives its food which it has to digest. And yet it is to this very
food that it owes the power which it afterwards puts forth at the