Sentence:  So when friends are "lied" into distrust of each other, and the <WSD>rubicon</WSD> has been passed, either by the death of one, or that the light of truth will not break in upon the mist resting upon the other, [...] at a day too late a discovery arises, and the perpetrators of this fruitless crime, console themselves with the saying that it was ""all for the sufferer's good."["] 
Meaning of the word marked with <WSD> tags:  A limit that when surpassed cannot be returned from, or an action that when taken cannot be reversed.