1. Sensation, remembrance, contemplation, etc., modes of thinking. When the mind turns its view
inwards upon itself, and contemplates its own actions, thinking is the first that occurs. In it the mind
observes a great variety of modifications, and from thence receives distinct ideas. Thus the
perception or thought which actually accompanies, and is annexed to, any impression on the body,
made by an external object, being distinct from all other modifications of thinking, furnishes the mind
with a distinct idea, which we call sensation;--which is, as it were, the actual entrance of any idea
into the understanding by the senses. The same idea, when it again recurs without the operation of
the like object on the external sensory, is remembrance: if it be sought after by the mind, and with
pain and endeavour found, and brought again in view, it is recollection: if it be held there long under
attentive consideration, it is contemplation: when ideas float in our mind, without any reflection or
regard of the understanding, it is that which the French call reverie; our language has scarce a
name for it: when the ideas that offer themselves (for, as I have observed in another place, whilst we
are awake, there will always be a train of ideas succeeding one another in our minds) are taken
notice of, and, as it were, registered in the memory, it is attention: when the mind with great
earnestness, and of choice, fixes its view on any idea, considers it on al sides, and will not be called
off by the ordinary solicitation of other ideas, it is that we call intention or study: sleep, without
dreaming, is rest from all these: and dreaming itself is the having of ideas (whilst the outward
senses are stopped, so that they receive not outward objects with their usual quickness) in the mind,
not suggested by any external objects, or known occasion; nor under any choice or conduct of the
understanding at all: and whether that which we call ecstasy be not dreaming with the eyes open, I
leave to be examined.
2. Other modes of thinking. These are some few instances of those various modes of thinking,
which the mind may observe in itself, and so have as distinct ideas of as it hath of white and red, a
square or a circle. I do not pretend to enumerate them all, nor to treat at large of this set of ideas,
which are got from reflection: that would be to make a volume. It suffices to my present purpose to
have shown here, by some few examples, of what sort these ideas are, and how the mind comes by
them; especially since I shall have occasion hereafter to treat more at large of reasoning, judging,
volition, and knowledge, which are some of the most considerable operations of the mind, and
modes of thinking.
3. The various degrees of attention in thinking. But perhaps it may not be an unpardonable
digression, nor wholly impertinent to our present design, if we reflect here upon the different state of
the mind in thinking, which those instances of attention, reverie, and dreaming, etc., before
mentioned, naturally enough suggest. That there are ideas, some or other, always present in the
mind of a waking man, every one's experience convinces him; though the mind employs itself about
them with several degrees of attention. Sometimes the mind fixes itself with so much earnestness
on the contemplation of some objects, that it turns their ideas on all sides; marks their relations and
circumstances; and views every part so nicely and with such intention, that it shuts out all other
thoughts, and takes no notice of the ordinary impressions made then on the senses, which at
another season would produce very sensible perceptions: at other times it barely observes the train
of ideas that succeed in the understanding, without directing and pursuing any of them: and at other
times it lets them pass almost quite unregarded, as faint shadows that make no impression.
4. Hence it is probable that thinking is the action, not the essence of the soul. This difference of
intention, and remission of the mind in thinking, with a great variety of degrees between earnest
study and very near minding nothing at all, every one, I think, has experimented in himself. Trace it
a little further, and you find the mind in sleep retired as it were from the senses, and out of the reach
of those motions made on the organs of sense, which at other times produce very vivid and sensible
ideas. I need not, for this, instance in those who sleep out whole stormy nights, without hearing the
thunder, or seeing the lightning, or feeling the shaking of the house, which are sensible enough to
those who are waking. But in this retirement of the mind from the senses, it often retains a yet more
loose and incoherent manner of thinking, which we call dreaming. And, last of all, sound sleep
closes the scene quite, and puts an end to all appearances. This, I think almost every one has
experience of in himself, and his own observation without difficulty leads him thus far. That which I
would further conclude from hence is, that since the mind can sensibly put on, at several times,
several degrees of thinking, and be sometimes, even in a waking man, so remiss, as to have
thoughts dim and obscure to that degree that they are very little removed from none at all; and at
last, in the dark retirements of sound sleep, loses the sight perfectly of all ideas whatsoever: since, I
say, this is evidently so in matter of fact and constant experience, I ask whether it be not probable,
that thinking is the action and not the essence of the soul? Since the operations of agents will easily
admit of intention and remission: but the essences of things are not conceived capable of any such
variation. But this by the by.