The better must come before the sweet; and that also makes the sweet the sweeter.
苦先于甜，甜更甜。
--John Bunyan
宝剑锋从磨砺出，梅花香自苦寒来。
Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.
乐观是通往成功的信念。没有希望和信心将一事无成。
——海伦·凯勒
你不自信一点，怎么乘风破浪？
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