In order to understand how reading works, we need to understand how the reading brain works. On the one hand, the way we read can vary greatly, from skimming to in-depth reading. On the other hand, we need to distinguish between reading proper and interpreting what we have read, as the two are physiologically distinct processes. "Interpreting what we have read consists of actualising one of the multiple virtualities that each text bears within itself." Given a constantly expanding world of reading, it is important to preserve our capacity to interpret texts - a skill which is vital to their comprehension and, therefore, their use.