I hold that the mark of a genuine idea is that its possibility can be proved, either a priori by conceiving its cause or reason, or a posteriori when experience teaches us that it is in fact in nature. Gottfried Leibniz conceiveexperiencefact share on social
The ultimate reason of things must lie in a necessary substance, in which the differentiation of the changes only exists eminently as in their source; and this is what we call God. Gottfried Leibniz calldifferentiationeminently Change image and share on social
It follows from what we have just said, that the natural changes of monads come from an internal principle, since an external cause would be unable to influence their inner being. Gottfried Leibniz externalinfluenceinternal Change image and share on social
But in simple substances the influence of one monad over another is ideal only. Gottfried Leibniz idealinfluencemonad Change image and share on social
There are also two kinds of truths: truth of reasoning and truths of fact. Truths of reasoning are necessary and their opposite is impossible; those of fact are contingent and their opposite is possible. Gottfried Leibniz contingentfactimpossible share on social
Finally there are simple ideas of which no definition can be given; there are also axioms or postulates, or in a word primary principles, which cannot be proved and have no need of proof. Gottfried Leibniz axiomdefinitionfinally Change image and share on social
This is why the ultimate reason of things must lie in a necessary substance, in which the differentiation of the changes only exists eminently as in their source; and this is what we call God. Gottfried Leibniz calldifferentiationeminently Change image and share on social
I maintain also that substances, whether material or immaterial, cannot be conceived in their bare essence without any activity, activity being of the essence of substance in general. Gottfried Leibniz activitybareconceive Change image and share on social
