Quote by Cicero: “Gratitude is not only the greatest of virtues, but the parent of all others.”

Recognizing what you have received from others — from people, from luck, from the world — is the foundation of almost every other good quality. Without gratitude you cannot develop generosity, humility, or genuine love. Cicero is saying that thankfulness isn't a feeling, it is a discipline that makes ethical life possible.

This line comes from Cicero's oration Pro Plancio, delivered in a Rome where political loyalty and betrayal were matters of life and death. Gratitude in Roman political life was not merely a social nicety but a binding obligation, and Cicero was arguing for its moral as well as political centrality.

Roman statesman, lawyer, philosopher, and orator who lived 106–43 BCE. He served as consul during the Catilinarian conspiracy and wrote extensively on rhetoric, ethics, and political philosophy. He was executed during the political turmoil following Julius Caesar's assassination, becoming a martyr for the Roman Republic.