The advance of the human mind towards any object of laudable pursuit,
may be compared to the progress of a body driven by a blow. It moves,
for a time, with great velocity and vigour, but the force of the first
impulse is perpetually decreasing, and though it should encounter no
obstacle capable of quelling it by a sudden stop, the resistance of the
medium through which it passes, and the latent inequalities of the
smoothest surface, will, in a short time, by continued retardation,
wholly overpower it. Some hindrances will be found in every road of
life, but he that fixes his eyes upon any thing at a distance,
necessarily loses sight of all that fills up the intermediate space, and
therefore sets forward with alacrity and confidence, nor suspects a
thousand obstacles, by which he afterwards finds his passage embarrassed
and obstructed. Some are indeed stopt at once in their career by a
sudden shock of calamity, or diverted to a different direction by the
cross impulse of some violent passion; but far the greater part languish
by slow degrees, deviate at first into slight obliquities, and
themselves scarcely perceive at what time their ardour forsook them, or
when they lost sight of their original design.

Weariness and negligence are perpetually prevailing by silent
encroachments, assisted by different causes, and not observed till they
cannot, without great difficulty, be opposed. Labour necessarily
requires pauses of ease and relaxation, and the deliciousness of ease
commonly makes us unwilling to return to labour. We, perhaps, prevail
upon ourselves to renew our attempts, but eagerly listen to every
argument for frequent interpositions of amusement; for, when indolence
has once entered upon the mind, it can scarcely be dispossessed but by
such efforts as very few are willing to exert.

It is the fate of industry to be equally endangered by miscarriage and
success, by confidence and despondency. He that engages in a great
undertaking, with a false opinion of its facility, or too high
conceptions of his own strength, is easily discouraged by the first
hindrance of his advances, because he had promised himself an equal and
perpetual progression without impediment or disturbance; when unexpected
interruptions break in upon him, he is in the state of a man surprised
by a tempest, where he purposed only to bask in the calm, or sport in
the shallows.

It is not only common to find the difficulty of an enterprize greater,