The Great Powers (1833)
It is much the same with studies and reading as with the observations of a journey or indeed with the happenings of life itself. However much the particular may attract and profi t us while we are enjoying it, in time it will nevertheless retreat into the background, become obscured, and disappear. Only the general impressions which we receive in one place or another, the totality of perception which comes to us either unconsciously or through particularly careful observations, remain to increase the sum of our knowledge. The most intensely enjoyed moments of our existence are fused in our memory and make up its living content.