Read it through once

This consciousness upon which he had intruded was the single opportunity of existence ever vouchsafed to Tess by an unsympathetic First Cause—her all; her every and only chance. How then should he look upon her as of less consequence than himself; as a pretty trifle to caress and grow weary of; and not deal in the greatest seriousness with the affection which he knew that he had awakened in her—so fervid and so impressionable as she was under her reserve—in order that it might not agonize and wreck her?