Parrhesia

In rhetoric, parrhesia is a figure of speech described as: to speak candidly or to ask forgiveness for so speaking. The term is borrowed from the Greek παρρησία (πᾶν "all" + ῥῆσις / ῥῆμα "utterance, speech") meaning literally "to speak everything" and by extension "to speak freely," "to speak boldly," or "boldness." It implies not only freedom of speech, but the obligation to speak the truth for the common good, even at personal risk.

Read more about Parrhesia:  Usage in Ancient Greece, New Testament Use, Modern Scholarship