All natural philosophers, who wished to proceed mathematically in their work, have hence invariably (although unknown to themselves) made use of meta… - Immanuel Kant

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All natural philosophers, who wished to proceed mathematically in their work, have hence invariably (although unknown to themselves) made use of metaphysical principles, and must make use of such, it matters not how energetically they may otherwise repudiate any claim of metaphysics on their science.