Poetria Nova

The air in this region of art may seem murky and the pathway rugged, the doors locked and the theory itself entangled with knots. Since that is so, the words that follow will serve as physicians for that disorder. Scan them well: here you will find a light to dispel the darkness, safe footing to traverse rugged ground, a key to unlock the doors, a finger to loose the knots. The way is thrown open; guide the reins of your mind as the nature of your course demands.

Geoffrey of Vinsauf