This concludes our series on Lucretius’s poem, The Way Things Are in which we have explored the intimate connection between science and philosophy. In this post, we will make some important concluding comments and connections.

Find part one here.

Find Part two here.

When exploring issues regarding the world we live in, both science and philosophical reflection are necessary. The distinction between essence and substance is why reflection on nature always involves both science and philosophy. Things which are composed of essence and substance have an immaterial and material character to them. Perhaps another example regarding physical reality and metaphysics, drawn from mathematics will help. The concept of numbers can be derived and abstracted from one physical object, two physical objects, etc. One can easily understand that two tables plus two tables equals four tables. However, the principles, axioms, and rules of logic which make algebra, calculus, and geometry are not strictly empirical and require a metaphysical foundation¹. In both, substantial objects and mathematical realities, science and philosophy are interacting.

What is to be said of the ideas of cause and substantial change given the principles of induction, uniformity, and the conservation of energy which Lucretius points out? The principles of uniformity and conservation (among others) are properties of Being. Another property of Being is causality or the notion of cause among things that change. The notion of cause or the principle of causality, has both philosophic and scientific implications. As demonstrated, Lucretius is interested in exploring the nature of causation in physical reality. He tells us that he is interested in the causes of events (3), the causes of things (3), and the causes of movement (16) and effects which derive from natural laws (85) which we can understand to be uniformity, conservation, and causation (among other natural laws). In the realm of becoming and physical existence, it is reasonable to think that things exist in a cause and effect relationship. Linguistically, logically, and analytically it does not make any sense to speak of a cause without an effect or an effect without a cause. By definition, an effect is that which has an antecedent cause. Lucretius understands this and holds to a general theory of causation which says that that which comes into being (contingent effects) must have a cause. Events, effects, and created or living things have a cause which explains the nature or reason for their existence. This is why the law of causality is considered an extension or application of the law of noncontradiction. The law of noncontradiction states that nothing can both be and not be at the same time and in the same respect. Actions and events cannot precede themselves just as non-being can not create Being. For something to create itself, it would have to exist prior to its existence which violates the law of noncontradiction. As Lucretius reminds us “nothing comes from nothing” (3). Philosophically and analytically, nothing is not a thing. It is a little weird to try to describe nothing ontologically because it has no existence whatsoever and is completely outside our knowledge of things in this world. The best one can do is call it pure or absolute non-being. It is impossible to think of nothing because if one tries, one is thinking of something and to think of something is not thinking of nothing. In Aristotelian terms, nothing or non-being has no act or potency.

Aristotle describes metaphysics as the study of being and the first principles and highest causes of reality. “Therefore it is of being as being that we also must grasp the first causes” explains Aristotle (Aristotle, Vol. 7, 522). Today, we can count among the first causes of reality the laws of logic, the law of causality, essence or form, the law of uniformity, mathematical truths, and many others. Strictly speaking, metaphysics is the study of transcendent realities which cannot be grasped by means of the senses. But there is an overlap between metaphysics and the physical sciences. Metaphysics points people to the logical structure of the world and in this sense, metaphysics allows people to study the world in the most general way. Metaphysics, as the study of “being as being,” is a body of knowledge about the world. Further, metaphysics shows us how truth is made coherent in any human field (all fields of knowledge want to correctly apply the law of noncontradiction, for example). Lucretius understands that there are basic laws of nature worthy of reflection. He acknowledges many important and foundational principles of reality. Upon reflection, we see that scientific laws are not strictly empirical but rely on metaphysical foundations. In this way, we understand that questions about the nature of the universe always involve both science and philosophy. Both are needed to interpret reality correctly.

Works Cited

Aristotle. The Works of Aristotle: 1. Great Books of the Western World. Vol. 7. Encyclopedia Britannica, Inc., 1999.

Lucretius. The Way Things Are. Great Books of the Western World. Vol. 11. Encyclopedia

Britannica, Inc., 1999.

1Mathematics is not always inductive or empirical. It also works deductively. Alan Turing, for example, built a calculating machine based on abstract laws of mathematics and logic (principles of metaphysics). His machine and the theory behind it laid the foundation for generalized modern computing. Metaphysics and logic can have a direct result in the physical world.