"When he to whom one speaks does not understand, and he who speaks himself does not understand, that is metaphysics"

This quote by Voltaire is a commentary on the nature of metaphysics. Metaphysics is a branch of approach that handles the nature of truth and the relationship between mind and matter. In this quote, Voltaire is suggesting that when two individuals are talking and neither of them understand what the other is stating, it is a type of metaphysics. This is due to the fact that the discussion is happening in a realm of abstract idea and ideas that are beyond the comprehension of either individual. The quote suggests that metaphysics is a kind of communication that is challenging to comprehend and can frequently lead to confusion and misunderstanding. It likewise suggests that the nature of truth is intricate and challenging to understand, and that it is frequently beyond the scope of human understanding. Ultimately, Voltaire's quote is a pointer that the nature of reality is typically mysterious and unknowable, and that it is very important to be available to various perspectives and concepts.