Affects and power of acting
An encounter affects bodily capacities together with their ideas. Affectus, conatus, and potentia address distinct contexts of change, perseverance, and power.
This current follows Spinoza’s own texts. Joy and sadness concern changes of power, while activity and passivity require examining causes.
Source
Baruch Spinoza, Ethica, Pars III, Definitio III; Propositiones VI–XI; Pars IV, Praefatio.