Sentence:  For two reasons then it is right to be content with that which happens to thee; the one, because it was done for thee and prescribed for thee, and in a manner had reference to thee, originally from the most ancient causes spun with thy destiny; and the other, because even that which comes severally to every man is to the power which administers the universe a cause of felicity and perfection, nay even of its very continuance.  For the integrity of the whole is <WSD>mutilated</WSD>, if thou cuttest off anything whatever from the conjunction and the continuity either of the parts or of the causes. And thou dost cut off, as far as it is in thy power, when thou art dissatisfied, and in a manner triest to put anything out of the way. 
Meaning of the word marked with <WSD> tags:  To render imperfect or defective.