If you let yourselves take in numbers of negative impressions from your own thoughts and memories you will increase 2nd Force in yourselves in connection with the 1st Force of trying to awaken and live in the life of the Work to some extent during the day.

Now suppose you are sufficiently interested and sufficiently conscious to notice how impressions fall on you mechanically, and suppose that you have sufficient valuation of the Work to wish to transform these impressions, which means not letting them simply fall on their usual place, exciting your usual dislikes and hatreds.

To do this Work requires effort. Effort in the Work is psychological. It is all about not identifying and Self-Remembering. Effort in the Work is all about observing oneself—observing 'I's in oneself and not going with them.