self, immediately languishes;
and in order to preserve its ardour, must be every moment supported by
a new flow of passion. For the same reason, despair, though contrary to
security, has a like influence.
It is certain nothing more powerfully animates any affection, than to
conceal some part of its object by throwing it into a kind of shade,
which at the same time that it chews enough to pre-possess us in favour
of the object, leaves still some work for the imagination. Besides that
obscurity is always attended with a kind of uncertainty; the effort,
which the fancy makes to compleat the idea, rouzes the spirits, and
gives an additional force to the passion.
As despair and security, though contrary to each other, produce the
same effects; so absence is observed to have contrary effects, and in
different circumstances either encreases or diminishes our affections.
The Duc de La Rochefoucault has very well observed, that absence
destroys weak passions, but encreases strong; as the wind extinguishes
a candle, but blows up a fire. Long absence naturally weakens our idea,
and diminishes the passion: But where the idea is so strong and lively
as to support itself, the uneasiness, arising from absence, encreases
the passion and gives it new force and violence.
SECT. V OF THE EFFECTS OF CUSTOM
But nothing has a greater effect both to encrease and diminish our
passions, to convert pleasure into pain, and pain into pleasure, than
custom and repetition. Custom has two original effects upon the mind, in
bestowing a facility in the performance of any action or the conception
of any object; and afterwards a tendency or inclination towards it;
and from these we may account for all its other effects, however
extraordinary.
When the soul applies itself to the performance of any action, or the
conception of any object, to which it is not accustomed, there is a
certain unpliableness in the faculties, and a difficulty of the spirit's
moving in their new direction. As this difficulty excites the spirits,
it is the source of wonder, surprize, and of all the emotions, which
arise from novelty; and is in itself very agreeable, like every thing,
which inlivens the mind to a moderate degree. But though surprize be
agreeable in itself, yet as it puts the spirits in agitation, it not
only augments our agreeable affections, but also our painful, according
to the foregoing principle, that every emotion, which precedes or
attends a
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