Boris Pasternak said this quote

It is she who has a hold on him. Doesn't she see how much he needs her? She has nothing to be afraid of, her conscience is clear. It is he who should be ashamed, and terrified of her giving him away. But that is just what she will never do. To do this she does not have the necessary ruthlessness--Komarovsky's chief asset in dealing with subordinates and weaklings. This is precisely the difference between them. And it is this that makes the whole of life so terrifying. Does it crush you by thunder and lightning? No, by oblique glances and whispered calumny. It is all treachery and ambiguity. Any single thread is as fragile as a cobweb, but just try to pull yourself out of the net, you only become more entangled. And the strong are dominated by the weak and ignoble.