"Per dare alla mente tutta la libertà di cui abbisogna

io ritengo che sia opportuno lasciarla libera di scorrere a suo piacimento ogni sorta di cognizione,

non per formarsi un più vasto sapere

ma per sviluppare i poteri e le attività dello spirito, la varietà e la libertà del pensiero."

"It is therefore to give them this freedom that

I think they should be made look into all sorts of knowledge and exercise their understandings

 in so wide a variety and stock of knowledge.

But I do not propose it as a variety and stock of knowledge,

but a variety and freedom of thinking, as an increase of the powers and activity of the mind, not as an enlargement of its possessions." 

( John Locke - Of the Conduct of the Understanding )