Not everyone knows when to be silent and when to go. It not infrequently happens that even diplomatic persons of good worldly breeding fail to observ… - Anton Chekhov

Good breeding doesn't mean that you won't spill sauce on the tablecloth, but that you won't notice when someone else does.

But she was incapable of really loving as I did, for she was cold and already somewhat corrupted. There was a demon in her, whispering to her day and night that she was enchanting, adorable; and, having no definite idea for what object she was created, or for what purpose life had been given her, she never pictured herself in the future except as very wealthy and distinguished ... of a perfect swarm of counts, princes, ambassadors, celebrated painters and artists, all of them adoring her and in ecstasies over her beauty and her dresses. . . .

A tree is beautiful, but what’s more, it has a right to life; like water, the sun and the stars, it is essential. Life on earth is inconceivable without trees. Forests create climate, climate influences peoples’ character, and so on and so forth. There can be neither civilization nor happiness if forests crash down under the axe, if the climate is harsh and severe, if people are also harsh and severe.... What a terrible future!