"When events and circumstances which have influenced us pass away in the course of time, we are unable to bring back and renew the particular mood or state of feeling which they aroused in us: but we can remember what we were led to say and do in regard to them; and thus form, as it were, the result, expression and measure of those events. We should, therefore, be careful to preserve the memory of our thoughts at important points in our life; and herein lies the great advantage of keeping a journal."