|After food and air, impressions are man's third
source of nourishment. Impressions are a real kind of food that
can either make us ill or contribute to our well-being. In order
to evolve, we must transform our impressions just as we transform
the other kinds of food we eat. In order to benefit from the
life of an impression, we have to add the energy of life, and
this is something that can only exist in the present: consciousness.