"It is good to rub and polish our brain against that of others"

This quote by Michel de Montaigne motivates us to engage in significant conversations with others in order to learn and grow. By talking with others, we can gain from their experiences and perspectives, and in turn, they can gain from ours. This exchange of ideas and knowledge can help us to broaden our understanding of the world and establish our own concepts. It is a way of "rubbing and polishing" our brains, as Montaigne puts it, and can help us to end up being more experienced and well-rounded people. This quote is a tip that we must benefit from the opportunity to gain from others and to engage in significant discussions. It is a pointer that we ought to not hesitate to challenge our own concepts and beliefs, and to be open to the ideas of others.