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Wellsprings
metaphysics

Actuality & Potentiality

ἐνέργεια / δύναμις

Aristotle's distinction between what a thing actually is (energeia) and what it has the capacity to become (dynamis).

Also: energeia · dynamis · act and potency

Aristotle developed the distinction between potentiality (dynamis) and actuality (energeia) to explain how things change and develop over time. Potentiality refers to what something can become or do but hasn't yet—a seed's capacity to grow into a tree, or a child's ability to learn language. Actuality is the realization of that potential, the thing as it exists in its complete or active state. This framework solved a major problem in Greek philosophy: how to explain change without contradicting the idea that "nothing comes from nothing."

The distinction clarifies why we don't need to know everything about something from birth. A person possesses the potential for knowledge from childhood, but actualizes that potential through learning and practice over time. Similarly, someone asleep has the capacity for wakefulness (potential) but doesn't exercise it until they wake (actual). This means potentiality is genuinely real, not mere illusion, yet different from what has already come to be—a middle ground between absolute being and absolute non-being that makes sense of development and growth.

Where this idea shows up

32 Greek sources·4 Jewish-canon citations

Where to read it