Substance (philosophy)

Definition and stakes

William James,  Essays in Radical Empiricism

“ V THE PLACE OF AFFECTIONAL FACTS IN A WORLD OF PURE EXPERIENCE [75]
Common sense and popular philosophy are as dualistic as it is possible to be. Thoughts, we all naturally think, are made of one kind of substance, and things of another. Consciousness, flowing inside of us in the forms of conception or judgment, or concentrating itself in the shape of passion or emotion, can be directly felt as the spiritual activity which it is, and known in contrast with the space-filling objective ‘content’ which it envelopes and accompanies.
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Source: Gutenberg

Jaime Luciano Balmes,  Fundamental Philosophy, Vol. 2…

“ All objective sensibility is founded on the intuition of extension; all the pure intellectual order in what relates to indeterminate ideas, is founded on the idea of being. We have seen that from the idea of being proceed the ideas of identity, distinction, unity, number, duration, time, simplicity, composition, the finite, the infinite, the necessary, the contingent, the mutable, the immutable, substance, accident, cause, and effect. ”
Source: Gutenberg

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