自由确实珍贵；如此珍贵以至于必须谨慎配给。

The battle of life is already half won by the young man who is brought personally in contact with high officials; and the great aim of every boy should be to do something beyond the sphere of his duties--something which attracts the attention of those who over him.

用我们的教学方法，导师教得少，但却观察得多。

Don't cry to quit, cry to keep going.