"Now one's own mind is a place the most free from 

 crowd and noise in the world, if a man's thoughts are such 

 as to ensure him perfect tranquillity within, and this tran- 

 quillity consists in the good ordering of the mind. Your 

 way is, therefore, to make frequent use of this retirement, 

 and refresh your virtue in it. And to this end, be always 

 provided with a few short, uncontested notions, to keep 

 your understanding true, and send you back content with 

 the business to which you return." Marcus Aurelius. 



