"Peace is not the absence of war." Spinoza said it, but it is mindlessly quoted out of context, for he added, "It is a virtue, a state of mind, a disposition for benevolence, confidence, justice."
This is the secret. You must step back, separate yourself from your everyday thoughts and habitual gestures: look at them. It is patient work, like the work of the watchmaker who observes the spirals and gears under the lens, cleans and calibrates. The secret is to retreat deep into oneself until one encounters an almost imperceptible vibration, which then becomes more and more evident, a silent, separate, calm vibration. Those who anchor themselves in this possess serenity all day long.