Never could I interest myself in a book if it were not the exact diet my mind required at the time, or in the very immediate future. The mind asked, received, and digested. So much was assimilated, so much expelled; then, after a season, similar demands were made, the same processes were repeated out of sight, below consciousness, as is the case in a well-ordered stomach.

Ch. 2. - Confessions of a Young Man (1886)