The most effective mirror is definitely an previous good friend.
An old dog barks not in vain.
Were it not for the bone in the legge, all the world would turne Carpenters (to make them crutches).
A gift much expected is paid, not given.
Calmness is great advantage; he that lets Another chafe, may warm him at his fire.
Old Camels carry young Camels skins to the Market.