"The most praiseworthy way of acquiring books is by writing them, Benjamin remarks in 'Unpacking My Library'. And the best way to understand them is also to enter their space: one never really understands a book unless one copies it, he says in
One-Way Street, as one never understands a landscape from an airplane but only by walking through it."
from Susan Sontag's Introduction to the Verso edition of
Walter Benjamin One-Way Street (1979) p.21