大自然是伟大的老师，当别人睡觉时，我从她那里学得最好。
Nature is the greatest teacher and I learn from her best when others are asleep.
Le ciel est, par-dessus le toit, / Si bleu, si calme!
Believe in yourself and all that you are.
Nature， to be commanded， must be obeyed.
如果你没有失败，说明你不够努力。