"associate yourself with men of good quality if you esteem your own reputation: for 'tis  better to be alone than in bad company" 



this quote means to surround yourself with  a good vibe of people. Dont be around negative people or people who just act dumb. Its better to be alone thena to have to deal with those kind of people. Think of yourself , who would you want to be around? Never listen to people who just wanna see you fail. Do the right choice and hang out with a good set of people.