Recollections

I know not any thing more pleasant, or more instructive, than to compare experience with expectation, or to register from time to time the difference between idea and reality. It is by this kind of observation that we grow daily less liable to be disappointed. ... At least record it to yourself before custom has reconciled you to the scenes before you, and the disparity of your discoveries to your hopes has vanished from your mind. It is a rule never to be forgotten, that whatever strikes strongly, should be described while the first impression remains fresh upon the mind.

—Samuel Johnson, letter to James Boswell, in his 'Life' volume 1.