Sentence:  I have that strong impression on my mind that a person who is guilty of a <WSD>ruse</WSD> will hesitate at no falsehood. If it was a <WSD>ruse</WSD>, and if it was a deceit, you are to judge whether that elevates the persons in your mind who are parties to that trick. 
Meaning of the word marked with <WSD> tags:  An action intended to deceive; a trick.