君子 gentleman ,a man with noble virtue
土 earth/dirt, in this case, it refers to territory, field, estate
刑(the wrongest translation previously provided)it means penalty, punishment. in this case, it refers to laws. this sentense tells that a gentleman always thinks of laws of the nation and obey them.
惠(the second wrongest translation, really sorry that I need to point that out, hope it doesn't hurt the guy above). it means kindheartedness. In this case, it means little favor, little kindness, little benefits. this sentense tells that despicable person always think of little benefits, and disobey the laws to pursue them.