But if he overdoes the recognition of life's transiency he may upset the delicate balance needed in his self-training for attainment of the goal. For, thus overdone, it will turn into manic depressiveness and pathological melancholia, into groundless fears and hopeless worries. The remark of Emerson that the strength of the spirit is expressed in its joy is useful here.

-- Notebooks Category 2: Overview of Practicies Involved > Chapter 5: Balance the Psyche > # 117