This is to bid us have a Care what Friendships we Contract, and what
Company we keep; for Contrary Humours and Manners will never agree
together. There can be no Thought of Uniting Those that Nature it self
has Divided. And this Caution holds good in all the Bus’ness of a Sober
Man’s Life; as Marriage, Studies, Pleasures, Society, Commerce, and the
like: ’Tis in some sort, with _Friends_ (Pardon the Coursness of the
Illustration) as it is with _Dogs in Couples_. They should be of the
Same Size, and Humour; and That which pleases the One should Please
the Other; But if they Draw Several Ways, and if One be too Strong for
T’other, they’ll be ready to Hang themselves upon Every Gate, or Style
they come at. This is the Moral of the Friendship betwixt a _Thrush_ and
a _Swallow_, that can never Live together.