"Be careful, however, lest this 
reading of many authors and books of every sort may tend to make you 
discursive and unsteady. You must linger among a limited number of 
master thinkers, and digest their works, if you would derive ideas which
 shall win firm hold in your mind. Everywhere means nowhere. When a person spends all his time 
in foreign travel, he ends by having many acquaintances, but no friends.
 And the same thing must hold true of men who seek intimate acquaintance
 with no single author, but visit them all in a hasty and hurried manner." -Seneca, Letters from a Stoic