It is impossible for the mind to remain undisturbed by thoughts, but anyone serious about the matter can certainly permit them entry or drive them away, and although their origin does not lie entirely under our control we can choose to approve of them and to adopt them.
My final words of advice to you are educate, agitate and organize; have faith in yourself. With justice on our side I do not see how we can loose our battle. The battle to me is a matter of joy. The battle is in the fullest sense spiritual. There is nothing material or social in it. For ours is a battle not for wealth or for power. It is battle for freedom. It is the battle of reclamation of human personality.