The meaning of the Julius Caesar quote" for he loves to hear that unicorns may be betrayed with trees?"

Answer 1

You need the whole quote
If he be so resolved,
I can o'ersway him; for he loves to hear
That unicorns may be betray'd with trees,
And bears with glasses, elephants with holes,
Lions with toils and men with flatterers;
But when I tell him he hates flatterers,
He says he does, being then most flattered
It means he likes to hear people put down - to mistake a beautiful rare unicorn with an eveyday tree. A bear who needs glasses. Swiss cheese elephants.