Mind is the centre of this outer expansion of man in the form of human body, and everything which is exhibited through the medium of the body proceeds from the centre, the mind. If our mind comes to a harmonious state, circumstances and environments will have no effect on it and there will be no disturbance within. Peace and tranquillity shall reign all through under all circumstances.
Taken from the book "Complete Works of Ram Chandra, Vol. 1 (1st Indian edn., 1989)", Chapter "Ways and Means", pg. 30, by Babuji Maharaj