The CALM is not just a simple absence of noise or other pollution, but it is first IN US ... Or rather it has to be FIRST IN US.
By losing our inner peace, we go astray, we scatter ourselves in a host of negative thoughts that hurt us, and it was then with us even as we lose touch by letting us be distracted by external aggressions of all kinds. The equivalence of external noise is the inner noise of our thoughts "polluting" we must first learn to listen, to learn, and then to hunt.
This little book very well done and quite short, gives us some simple keys to become much closer to our deeper consciousness that supports all our sensory perceptions.
If we can manage that, then only appears quiet and tranquility of our selves (our soul, our mind, etc). It then becomes possible and even more easy to not lose that inner calm that is the source of well being and absolute tranquility, and even happiness.
Small popular book very affordable and easy to read. Several simple exercises help us to acquire this precious "Wisdom". Would recommend to anyone looking for inner peace.