Futurity is impregnable to mortal ken: no prayer pierces through heaven's adamantine walls. Whether the birds fly right or left, whatever be the aspect of the stars, the book of nature is a maze, dreams are a lie, and every sign a falsehood.
Friedrich SchillerKnowledge, the object of knowledge and the knower are the three factors which motivate action; the senses, the work and the doer comprise the threefold basis of action.
Friedrich Schiller