This spirit may be defined as a kind of cultivated sensuality, ardently enamoured of the beautiful in the world of sense, while fully devoted to intellectual truth, and at the same time always conscious of the nothingness of things, the instant pressure of death, the treacherousness of mortal delights.
"A Short History of French Literature"
George Saintsbury
He also immediately sent word to the sultan that, since by so infamous an action he had violated all the engagements which had subsisted between them, he, from that instant, declared himself his mortal enemy, and would take vengeance upon him for his treacherousness and cruelty by ravaging his country with fire and sword.
"Genghis Khan, Makers of History Series"
Jacob Abbott
He had experienced that forest life himself, had witnessed it, had passed through it; therefore it gave him the greater enjoyment to look from his height and gaze on those matos, admire their beauty, and be guarded from their treacherousness.
"Stories by Foreign Authors: Polish"
Various