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Sivu 47 - Human knowledge and human power meet in one, for where the cause is not known the effect cannot be produced. Nature to be commanded must be obeyed, and that which in contemplation is as the cause is in operation as the rule.
Sivu 93 - Those who have handled sciences have been either men of experiment or men of dogmas. The men of experiment are like the ant ; they only collect and use : the reasoners resemble spiders, who make cobwebs out of their own substance. But the bee takes a middle course ; it gathers its material from the flowers of the garden and of the field, but transforms and digests it by a power of its own.