Others can better write about Nelson Mandela's impact on the world stage, on how he stood up for the dignity of all people and on how he changed our world.
For those that seek to make a change in the world, whether global or local, one lesson of his life is this:
You can make a difference.
You can stand up to insurmountable forces.
You can put up with far more than you think you can.
Your lever is far longer than you imagine it is, if you choose to use it.
If you don't require the journey to be easy or comfortable or safe, you can change the world.