"He had two lives: one, open, seen and known by all who cared to know, full of relative truth and of relative falsehood, exactly like the lives of his friends and acquaintances; and another life running its course in secret. And through some strange, perhaps accidental, conjunction of circumstances, everything that was essential, of interest and of value to him, everything in which he was sincere and did not deceive himself, everything that made the kernel of his life, was hidden from other people."

Source: Anton Chekhov (2013). “Delphi Complete Works of Anton Chekhov (Illustrated)”, p.2943, Delphi Classics