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True happiness comes from love for oneself and others.

解釋：舉出了典故卻忘記了祖宗。

Nature has placed mankind under the governance of two sovereign masters， pain and pleasure.

"Capitalism is the best system ever invented to lift people out of poverty."

The more determinedly I exist, as myself, within the conditions of the time, the more clearly I shall hear the language of the past, the nearer I shall feel the breath of the centuries.