feelings of satisfaction and dissatisfaction, desires and aversions, and
other emotional conditions, together with determinations of the will, in
every variety of permutation and combination.

In most of our concrete states of consciousness all these different
classes of ingredients are found simultaneously present to some degree,
though the relative proportion they bear to one another is very
shifting. One state will seem to be composed of hardly anything but
sensations, another of hardly anything but memories, etc. But around the
sensation, if one consider carefully, there will always be some fringe
of thought or will, and around the memory some margin or penumbra of
emotion or sensation.

In most of our fields of consciousness there is a core of sensation that
is very pronounced. You, for example, now, although you are also
thinking and feeling, are getting through your eyes sensations of my
face and figure, and through your ears sensations of my voice. The
sensations are the _centre_ or _focus_, the thoughts and feelings the
_margin_, of your actually present conscious field.

On the other hand, some object of thought, some distant image, may have
become the focus of your mental attention even while I am
speaking,--your mind, in short, may have wandered from the lecture; and,
in that case, the sensations of my face and voice, although not
absolutely vanishing from your conscious field, may have taken up there
a very faint and marginal place.

Again, to take another sort of variation, some feeling connected with
your own body may have passed from a marginal to a focal place, even
while I speak.