阅读理解
   There is an old English saying.It tells us that we must go to bed early and get up early in the morning.Then we shall be healthy.We shall also be rich and clever.This is true.The body must have enough sleep to be healthy.Children of young age should have ten hours' sleep every night.Children who do not have enough sleep cannot do their work well and they may not be healthy.The body also needs exercise.Walking, running, jumping and playing games are all exercise.Exercise keeps the body strong.Exercise also helps the blood to move around inside the body.It is very important.Our blood moves to all parts of our body.The head also needs blood.Exercise helps us to think better.

   晏子之晋，至中牟①，睹弊冠、反裘、负刍②、息于途侧者，以为君子也。使人问焉，曰：“子何为者也？”对曰：“我越石③父也。”晏子曰：“何为而至此？”曰：“吾为人臣仆三年矣。”曰：“可得赎乎？”对曰：“可。”遂解左骖④以赎之，载而与归。至舍，不辞而入。越石父怒而请绝。晏子使人应之曰：“婴未尝得交夫子也。今免子于患，吾于子犹未可耶？子何绝我之暴⑤也！”越石父曰：“吾闻士诎⑥乎不知己，而信⑦乎知己者。吾三年为臣仆，而莫吾知也；今子赎我，吾以子为知我矣。向者子乘，不我辞也，吾以子为忘。今又不辞而入，是与臣仆我者同矣。我犹且为臣仆，请鬻⑧于世。”晏子出，请见，曰：“向者见客之容，今也见客之意。婴闻之，省行⑨者不引其过，察实者不讥其辞，婴可以辞⑩而无弃乎？”越石父曰：“夫子礼之，敢不敬从？”晏子遂以为上客。

（《晏子春秋•内篇第五》）

【注】①中牟：地名，在今河南。②刍：柴草。③越石：地名。④骖：指驾在车两旁的马。⑤暴：猛、急。⑥诎：通“屈”，屈服。⑦信：通“伸”，伸展。⑧鬻（yù）：卖。⑨行：德行。⑩辞：谢罪、道歉。

本文通过对话表现人物性格，颇为传神。请分别概括晏子和越石父的性格特点。