Rationalism vs. Empiricism: A Philosophical Showdown
Rationalism vs. Empiricism
Rationalist Doctrine
Rationalism prioritizes reason as the primary source of knowledge, rejecting revelation, faith, and sensory experience. This philosophy originated with Descartes.
Key Principles of Rationalism
- Confidence in Human Reason: Reason is the sole power leading to truth, opposing potentially misleading senses.
- Mechanism: The world, modeled as a machine, reduces to matter and motion.
- Evidence: Absolute certainty is achievable through reason, though it can be hindered by prejudices, haste, and passions. True knowledge must be evident.
- Clear and Distinct Ideas: Descartes employed doubt to find indubitable truths, questioning senses, reasoning, and reality itself.
- Substance: The concrete existent, whose primary property is existence.
- Infinite Substance (God): Doubt reveals human imperfection, yet the idea of perfection implies a perfect being (God). God serves as the guarantor of evidence, sustains existence, and initiated the world’s motion.
- Soul as Finite Substance: The soul’s essence is thought, encompassing judgment, reason, and will.
- Body as Finite Substance: The body’s essence is extension, with modes of figure and movement. Secondary qualities are subjective.
English Empiricism
The unique socio-political climate of 17th- and 18th-century England, marked by the bourgeois revolution, contrasted with continental absolutism, fostering empiricism.
Rationalism vs. Empiricism: A Contrast
Rationalism emphasizes the mathematical aspects of modern science, while empiricism highlights the importance of experience.
Key Principles of Empiricism
- Origin of Knowledge: Experience is the source of all knowledge, denying innate ideas.
- Unlimited Knowledge?: Empiricism potentially limits human knowledge, denying metaphysics and knowledge of God or the soul.
- Locke’s Idea: An idea is an object of thought, derived from experience (reflection, sensation).
- Simple and Complex Ideas: Simple ideas are basic units, while complex ideas are combinations of simple ones.
Hume’s Empiricism
- Empirical Basis: All knowledge originates in experience.
- Immanence: Knowledge is limited to the realm of experience.
- Copy Principle: Ideas are copies of impressions from senses.
- Association of Ideas: Ideas are linked by contiguity, succession, and repeated experience.
- Denial of General Ideas: Abstract general ideas are rejected.
- Relations of Ideas vs. Matters of Fact: Relations of ideas (e.g., mathematical propositions) are certain, while matters of fact lack this certainty.
- Problem of Reality: Impressions guarantee present reality, memories past realities, but the future remains uncertain.
- Belief in Future Events: Despite lacking impressions of the future, we form beliefs about it.
- Critique of Metaphysics: Hume rejects metaphysics as knowledge beyond experience.
- Critique of Corporeal Substance: We only know phenomenal properties, not the substance itself.
- Critique of Self: The self is a succession of perceptions, not a thinking substance.
- Critique of God: Empirical knowledge cannot access God’s essence or existence.
- Moral Feeling: Morality is rooted in universal human sentiment.