Cada hombre lleva dentro de sí todas las edades de la humanidad.

The most important thing you can do to achieve your goals is to make sure that as soon as you set them, you immediately begin to create momentum.

Science should be accessible to everyone, regardless of background.

【译文】三个人一起走路，其中必定有可以为我所学习的人。我选取那些优良的方面学习它，对那些不良的方面则加以改正。

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

赏析：指出知道满足的人不会被利益所累，真正安闲自得的人不会因为失去而恐惧，注重内心修养的人不会因为没有地位而惭愧。