For a man to attain to an eminent degree in learning costs him time, watching, hunger, nakedness, dizziness in the head, weakness in the stomach, and other inconveniences.
Miguel de CervantesMake it thy business to know thyself, which is the most difficult lesson in the world. Yet from this lesson thou will learn to avoid the frog's foolish ambition of swelling to rival the bigness of the ox.
Miguel de Cervantes