Affect theory draws on Spinoza's distinction between affects (affectus) — the increases and decreases in a body's power to act — and emotions, which are the personal,
conscious interpretations of those affective states. Deleuze and Guattari develop this into a philosophy of pre-personal intensities: affect is what happens before the subject has organized experience into named emotions. Brian Massumi's work has been particularly influential in connecting Spinozan affect theory to cultural and aesthetic analysis. For poets, affect theory opens a
space between
sensation and emotion, between the body's response and the mind's interpretation — a space that poetry, through rhythm, sound, and
image, is uniquely equipped to inhabit. Affect differs from emotion in being transpersonal and in existing at the threshold of the conscious and the somatic. Related terms: emotion, intensity, sensation, Spinoza's conatus, Deleuze's plane of immanence.