Marcus Tullius Cicero was a Roman philosopher who lived in the first century BCE and was one of the most influential figures of the Roman Republic. Often listed among the greatest orators and writers of all time, Cicero wrote extensively on many topics, including politics, philosophy, law, rhetoric, and literature. His writings are characterized by their clarity, precision, and eloquence, which can be seen in this heartwarming quote about friendship. His work has had a lasting impact on Western civilization and his ideas are still studied today.