Uninvited Guests Seldom Meet A Welcome.

A Person's True Nature Will Reveal Itself Despite Disguise.

A Doubtful Friend Is Worse Than A Certain Enemy. Let A Man Be One Thing Or The Other, And We Then Know How To Meet Him.

Betray A Friend, And You'll Often Find You Have Ruined Yourself.

Those Who Enter Through The Back Door Can Expect To Be Shown Out Through The Window

Necessity Knows No Law.