Inner Irritation

The irritability that kept them apart had no external cause, and all efforts to come to an understanding intensified it, instead of removing it. It was an inner irritation, grounded in her mind on the conviction that his love had grown less; in his, on regret that he had put himself for her sake in a difficult position, which she, instead of lightening, made still more difficult. Neither of them gave full utterance to their sense of grievance, but they considered each other in the wrong, and tried on every pretext to prove this to one another.

- Leo Tolstoy, Anna Karenina