"There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true"

In this quote, Niels Bohr is going over the principle of fact and how it can be classified into 2 types: insignificant and excellent. Trivial realities are those that are simple and apparent, while great facts are more profound and significant. According to Bohr, the reverse of an unimportant fact is something that is plainly incorrect, meaning it breaks what is typically accepted as real. On the other hand, the reverse of an excellent fact is also real, suggesting that there can be several viewpoints or interpretations of a terrific reality. This quote highlights the complexity of reality and how it can be perceived differently depending on the context.