Although philosophy considers all attitudes to be relative, it makes use of particular attitudes as and when necessary. Because it recognizes the factor of destiny and tries to detect the trend of events and to adjust itself to that trend, at certain periods it is optimistic, at other periods pessimistic. It knows there are times when the greatest efforts will still go badly. This is why the philosopher disciplines himself to endure with equanimity misfortunes which are such that none can avoid them, but on the other hand he seeks to overcome with resolution those which need to be fought against.
-- Notebooks Category 9: From Birth to Rebirth > Chapter 3: Laws and Patterns of Experience > # 152
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