Sorry have to post the whole quote:

“There will be times when struggle seems impossible. I know this already. Alone, unsure, dwarfed by the scale of the enemy. Remember this: freedom is a pure idea. It occurs spontaneously and without instruction. Random acts of insurrection are occurring constantly throughout the galaxy. There are whole armies, battalions that have no idea that they’ve already enlisted in the cause. Remember that the frontier of the Rebellion is everywhere. And even the smallest act of insurrection pushes our lines forward. And remember this: the imperial need for control is so desperate because it is so unnatural. Tyranny requires constant effort. It breaks, it leaks. Authority is brittle. Oppression is the mask of fear. Remember that. And know this: the day will come when all of these skirmishes and battles, these moments of defiance will have flooded the banks of the Empire’s authority and then there will be one too many. One single thing will break the siege. Remember this: Try.”