simple as not to consist of more Parts, than are to be found in any moral Reasoning, which runs not into Chimera and Conceit. If we can trace the Principles of the human Mind thro' a few Steps, we may be very well satisfy'd with our Progress; considering how soon Nature throws a Bar to all our Enquiries concerning Causes, and reduces us to an Acknowledgment of our Ignorance. The chief Obstacle, therefore, to our Improvement in the moral or metaphysical Sciences is the Obscurity of the Ideas, and Ambiguity of the Terms. The principal Difficulty in the Mathematics in the Length of Inferences and Compass of Thought, requisite to the forming any Conclusion. And per+haps, our Progress in natural Philosophy is mostly retarded by the Want of proper Experiments and Phenomena, which often are discover'd by Chance, and cannot always be found, when requisite, even by the most diligent and prudent Enquiry. A moral Philosophy seems hitherto to have received less Improvements than either Geometry or Physics, we may conclude, that, if there be any Difference in this Respect amongst these Sciences, the Difficulties, which obstruct the Progress of the former, require the greatest Care and Capacity to be surmounted.
There are no Ideas, that occur in Metaphysics, more obscure and uncertain, than those of Power, Force, Energy, or necessary Connexion, which it is every Mo-ment
