你知道,有些鸟儿是注定不会被关在牢笼里的,它们的每一片羽毛都闪耀着自由的光辉。
幸福的唯一途径是做真实的自己。
The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.