Friendship is the only thing in the world concerning the usefulness of which all mankind are agreed.
Marcus Tullius CiceroRead
No one can speak well, unless he thoroughly understands his subject.
Interpretation
Effective communication is rooted in a deep understanding of the topic being discussed.
Marcus Tullius Cicero emphasizes the importance of knowledge as a foundation for effective communication. To convey ideas clearly and persuasively, one must possess a thorough understanding of the subject matter, as this depth of knowledge enables speakers to address questions, address different perspectives, and convey confidence, ultimately leading to clearer and more impactful communication.
In practice
During a presentation, one might quote Cicero to emphasize the need for mastering the topic at hand.
Friendship is the only thing in the world concerning the usefulness of which all mankind are agreed.
Those wars are unjust which are undertaken without provocation. For only a war waged for revenge or defence can actually be just.
Orators are most vehement when their cause is weak.
Nothing contributes to the entertainment of the reader more, than the change of times and the vicissitudes of fortune.
No one has the right to be sorry for himself for a misfortune that strikes everyone.
Advice in old age is foolish; for what can be more absurd than to increase our provisions for the road the nearer we approach to our journey's end.
One of the greatest gifts adults can give - to their offspring and to their society - is to read to children.
I never heard of anyone who was really literate or who ever really loved books who wanted to suppress any of them.
Education is simply the soul of a society as it passes from one generation to another.
There is a peculiar aesthetic pleasure in constructing the form of a syllabus, or a book of essays, or a course of lectures. Visions and shadows of people and ideas can be arranged and rearranged like stained-glass pieces in a window, or chessmen on a board.
As always, a lot of bad books will be published. Some good books will be published, and you have to seek them out.
Libraries are not just for reading in, but for sociable thinking, exploring, exchanging ideas and falling in love. They were never silent. Technology will not change that, for even in the starchiest heyday of Victorian self-improvement, libraries were intended to be meeting places of the mind, recreational as well as educational.
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