Bases of Yoga, The Mother's Talks
How can we establish a settled peace and silence in the mind?
      
First of all, you must want it. And then you must try and must persevere, continue trying. ... You sit quietly, to begin with; and then, instead of thinking of fifty things, you begin saying to yourself, "Peace, peace, peace, peace, peace, calm, peace!" You imagine peace and calm. You aspire, ask that it may come: "Peace, peace, calm." And then, when something comes and touches you and acts, say quietly, like this, "Peace, peace, peace." Do not look at the thoughts, do not listen to the thoughts, you understand. You must not pay attention to everything that comes. You know, when someone bothers you a great deal and you want to get rid of him, you don't listen to him, do you? Good! You turn your head away (gesture) and think of something else. -p4