Question

What does this quote mean? "True peace is not the absence of tension; it is the presence of justice." --Martin Luther King Jr.

Answer 1

One of the greatest revolutionaries, Martin Luther King Jr has rightly said the above quote.
It's meaning is simple - True peace is generally when you have justice. For example, if you have access to courts, then that will automatically be categorised as true peace.

Answer 2

hii !! here is ur ans

By true peace Dr. King means everyone is getting along and treated equally and there are no more crimes being made. The ending of racism could be described as absence of tension.
Martin Luther King means by true peace is to be free and have rights. Absence of tension would mean to get comfortable. 

He want the world to be peaceful. Stressing always worrying and always mad create tension. To bring peace stop doing the negative stuff and start doing the positive.

hope this will help...