Knowledge rests not upon truth alone, but upon error also.
From the middle of life onward, only he remains vitally alive who is ready to die with life.
Aging people should know that their lives are not mounting and unfolding but that an inexorable inner process forces the contraction of life. For a young person it is almost a sin and certainly a danger to be too much occupied with himself; but for the aging person it is a duty and a necessity to give serious attention to himself.
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