To understand a profound thought is to have, at the moment...

To understand a profound thought is to have, at the moment one understands it, a profound thought oneself; and this demands some effort, a genuine descent to the heart of oneself . . . Only desire and love give us the strength to make this effort. The only books that we truly absorb are those we read with real appetite, after having worked hard to get them, so great had been our need of them.