Substance, nature, and necessity › Eternity and the intellectual love of God

Spinoza distinguishes three kinds of knowledge in II.40, scholium II. The first includes experience from particular encounters, in which the senses present things in a fragmentary way, and ideas formed through signs such as words. He calls this opinion or imagination. The second kind, reason, proceeds from common notions and adequate ideas of the properties of things.

His third kind is intuition: it proceeds from an adequate idea of the absolute essence of certain attributes of God to adequate knowledge of the essence of things. Here intuition means that kind of adequate understanding; a feeling of certainty by itself does not meet the definition. The distinction concerns how something is understood. Part V.25 identifies understanding things through this third kind as the mind's highest endeavor and virtue.

The later propositions of Part V connect the highest kind of knowledge with the intellectual love of God. In V.32, understanding through the third kind of knowledge produces joy accompanied by the idea of God as cause; its corollary identifies the intellectual love of God. V.36 places that love within God's infinite intellectual love. This continues the book's account of human activity within the one substance.

The closing account is not simply a promise of a familiar personal afterlife. V.21 ties imagination and memory to the body's duration. V.23 nevertheless asserts that something of the mind is eternal. Part I's definition of eternity distinguishes necessary existence from duration, even duration without beginning or end. It would be equally careless to identify eternity with endless autobiographical memory or to say that the book simply denies every form of the mind's eternity.

These propositions raise a difficult interpretive question about the relationship between eternal understanding and the individual person whose life we experience in time. The distinction from duration helps locate the question; it does not make every difficulty disappear. A reader can find the ethical account of activity worth studying while remaining unconvinced by this final part of its metaphysics.

Proposition 42 concludes that blessedness is virtue itself rather than a reward for virtue. Spinoza thus connects the end of the argument with the activity of understanding, rather than with compensation granted later by an external judge. His account asks whether becoming more active and understanding our place in nature can constitute a better life within necessity. Assessing that answer means following both its causal explanation and its account of what is worth pursuing.