Whatever method one may pursue from meditation to peace invocation leading to the descent of Peace, yet it is permanently established only when the desire self is completely quietened and the egoism largely diminished by contact with the Divine and Her Service. Short of that the disturbances tend to return after long or short periods, generally with diminished force riding on waves of passion, emotion or some want or expectation. One has to keep offering it until the whole field of Nature and activities are taken up by Her or else all becomes sincere and one-pointed by the progressive opening to the Grace.
Affectionately,
Alok Da