This quote by Aesop talks to the concept that it is a lot easier to be brave when one is not in direct threat. It is simple to discuss being brave and brave when one is not in a circumstance that requires them to be brave. It is much more difficult to be brave when one is in a dangerous circumstance and needs to deal with the consequences of their actions. This quote is a tip that bravery is not something that can be ignored and that it needs a lot of guts to deal with danger head on. It is simple to be brave from a safe range, however it takes a special kind of nerve to be brave when one remains in the middle of threat.
"While civilization has been improving our houses, it has not equally improved the men who are to inhabit them. It has created palaces, but it was not so easy to create noblemen and kings"