[Footnote: _And young Sensation_, l. 72. Sensation is an
exertion or change of the central parts of the sensorium or
of the whole of it, _beginning_ at some of those extreme
parts of it which reside in the muscles or organs of sense.
Sensitive ideas are those which are preceded by the sensation
of pleasure or pain, are termed Imagination, and constitute
our dreams and reveries.]

"Oft from sensation quick VOLITION springs,
When pleasure thrills us, or when anguish stings;
Hence Recollection calls with voice sublime
Immersed ideas from the wrecks of Time,
With potent charm in lucid trains displays
Eventful stories of forgotten days.
Hence Reason's efforts good with ill contrast,
Compare the present, future, and the past; 80
Each passing moment, unobserved restrain
The wild discordancies of Fancy's train;
But leave uncheck'd the Night's ideal streams,
Or, sacred Muses! your meridian dreams.

[Footnote: _Quick Volition springs_, l. 73. Volition is an
exertion or change of the central parts of the sensorium, or
of the whole of it _terminating_ in some of those extreme
parts of it which reside in the muscles and organs of sense.
The vulgar use of the word _memory_ is too unlimited for our
purpose: those ideas which we voluntarily recall are here
termed ideas of _recollection_, as when we will to repeat the
alphabet backwards. And those ideas which are suggested to us
by preceding ideas are here termed ideas of _suggestion_, as
whilst we repeat the alphabet in the usual order; when by
habits previously acquired B is suggested by A, and C by B,
without any effort of deliberation. Reasoning is that
operation of the sensorium by which we excite two or many
tribes of ideas, and then reexcite the ideas in which they
differ or correspond. If we determine this difference, it is
called judgment; if we in vain endeavour to determine it, it
is called doubting.

If we reexcite the ideas in which they differ, it is called
distinguishing. If we reexcite those in which they
correspond, it is called comparing.]

[Footnote: _Each passing moment_, l. 81. During our waking
hours, we perpetually compare the passing trains of our ideas