Lucian Adversus indoctum et libros multos ementem 1

[1] Let me tell you, that you are choosing the worst way to attain your object. You think that by buying up all the best books you can lay your hands on, you will pass for a man of literary tastes: not a bit of it; you are merely exposing thereby your own ignorance of literature. Why, you cannot even buy the right things: any casual recommendation is enough to guide your choice; you are as clay in the hands of the unscrupulous amateur, and as good as cash down to any dealer. How are you to know the difference between genuine old books that are worth money, and trash whose only merit is that it is falling to pieces? You are reduced to taking the worms and moths into your confidence; their activity is your sole clue to the value of a book; as to the accuracy and fidelity of the copyist, that is quite beyond you.