An education itself...

"God is no fonder of intellectual slackers than of any other slackers. If you are thinking of becoming a Christian, I warn you you are embarking on something which is going to take the whole of you, brains and all. But, fortunately, it works the other way round. Anyone who is honestly trying to be a Christian will soon find his intelligence being sharpened: one of the reasons why it needs no special education to be a Christian is that Christianity is an education itself. That is why an uneducated believer like Bunyan was able to write a book that astonished the whole world." - C.S. Lewis in Mere Christianity