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The value and utility of any experiment are determined by the fitness of the material to the purpose for which it is used.
Happiness is not a matter of intensity but of balance, order, rhythm and harmony.
Sometimes you have to lose yourself before you can find anything.
摆脱爱情痛苦的唯一方法是爱得更多。
Success is walking from failure to failure with no loss of enthusiasm.
The spread of liberal democracy and the integration of the world economy have created a situation in which the major powers are no longer willing to go to war with one another.