all things are difficult before they are easy.
all work and no play makes jack a dull boy.
只會用功不玩耍，聰明孩子也變傻。
a man becomes learned by asking questions.
不恥下問才能有學問。
a man can do no more than he can.
凡事都應量力而行。
a man cannot spin and reel at the same time.
一心不能二用。
a man is known by his friends.
什麼人交什麼朋友。