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Mathematics is a living subject, constantly evolving and growing.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
Fate and temperament are two names for the same concept.
过去总是紧张的,未来是完美的。
不幸之人有权结束自己的生命,尽可自行决定。但是,那将铸成大错。生命虽不幸,总有可为,也总可有所作为。活着就有希望。