It is the work of a lifetime to venture on such a great improvement of character as will place the lower self under our control, instead of our being controlled by it. We are likely to get disheartened at times by the seeming slowness of progress. This is partly because we are too apt to think in terms of this single incarnation only, whereas those who understand life's actual range think of it in terms of dozens and scores. Hence we have to learn a certain tolerant patience with ourselves, while at the same time maintaining an ardent aspiration for self-improvement and a critical attitude towards our weaknesses. This sounds contradictory but it is not really so. It is rather a matter of getting a proper balance between the two attitudes.
-- Notebooks Category 6: Emotions and Ethics > Chapter 1: Uplift Character > # 415