and lose their way. Diverse opinions in Science are
stultifying. All must have one Principle and the same
rule; and all who follow the Principle and rule have but [10]
one opinion of it.
Whosoever understands a single rule in Science, and
demonstrates its Principle according to rule, is master
of the situation. Nobody can gainsay this. The ego-
tistical theorist or shallow moralist may presume to [15]
make innovations upon simple proof; but his mistake
is visited upon himself and his students, whose minds