Other
beliefs, such as the facts of history, are held rather less firmly....
Beliefs about the future, as that the sun will rise to-morrow and
that the trains will run approximately as in Bradshaw, may be held
with almost as great conviction as beliefs about the past. Scientific
laws are generally believed less firmly.... Philosophical beliefs,
finally, will, with most people, take a still lower place, since the
opposite beliefs of others can hardly fail to induce doubt. Belief,
therefore, is a matter of degree. To speak of belief, disbelief,
doubt, and suspense of judgment as the only possibilities is as if,
from the writing on the thermometer, we were to suppose that blood
heat, summer heat, temperate, and freezing were the only
temperatures." Beliefs which require to be confirmed by future
experience, or which actually refer to it, are evidently only
presumptions; it is merely the truth of presumptions that empirical
logic applies to, and only so long as they remain presumptions.
Presumptions may be held with very different degrees of assurance, and
yet be acted upon, in the absence of any strong counter-suggestion; as
the confidence of lovers or of religious enthusiasts may be at blood
heat at one moment and freezing at the next, without a change in
anything save in the will to believe.
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