There is nothing more wretched than that soul, which in a kind of circuit compasseth all things, searching (as he saith) even the very depths of the earth; and by all signs and conjectures prying into the very thoughts of other men's souls; and yet of this, is not sensible, that it is sufficient for a man to apply himself wholly, and to confine all his thoughts and cares to the tendance of that spirit which is within him, and truly and really to serve him.