Experientia docet is found in various forms in classical Latin: Tacitus uses it, and it appears in Pliny and other writers. The full form sometimes given is experientia docet stultos (experience teaches fools) — a more cynical variant suggesting that only fools require the harsh lessons of experience, while
the wise can learn from reason or from the experience of others. Students should note this more ironic dimension of the phrase: the poet who invokes experientia docet may be claiming hard-won wisdom, but they may also be implicitly confessing to a certain amount of preventable foolishness. The phrase is closely related to the concept of the pathei mathos — learning through suffering — which Aeschylus articulates in the Agamemnon: "wisdom comes through suffering." Related terms include sapientia (wisdom), prudentia (practical wisdom), the Aristotelian phronesis (practical judgment), and the distinction between book learning (doctrina) and lived wisdom (sapientia).