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 right time. * * * * * Opinion is like a pendulum and obeys the same law. If it goes past the centre of gravity on one side, it must go a like distance on the other; and it is only after a certain time that it finds the true point at which it can remain at rest. * * * * * By a process of contradiction, distance in space makes things look small, and therefore free from defect. This is why a landscape looks so much better in a contracting mirror or in a _camera obscura_, than it is in reality. The same effect is produced by distance in time. The scenes and events of long ago, and the persons who took part in them, wear a charming aspect to the eye of memory, which sees only the outlines and takes no note of disagreeable details. The present enjoys no such advantage, and so it always seems defective.