you wish to succeed, you should use persistence as your good friend, experience as your reference, prudence as your brother and hope as your sentry. 如果你希望成功,当以恒心为良友、以经验为参谋、以谨慎为兄弟、以希望为哨兵。
Do not know how high the sky is until one climbs up the tops of mountains,and do not know how thick the earth is until one comes to the deep river. 不登高山,不知天之高也;不临深溪,不知天之厚也。