It is the peaceful one who is observant. It is peace that gives him the power to observe keenly. It is the peaceful one, therefore, who can conceive, for peace helps him to conceive. It is the peaceful who can contemplate; one who has no peace cannot contemplate properly. Therefore, all things pertaining to spiritual progress in life depend upon peace.
Hazrat Inayat Khan (1973). “The Sufi Message of Hazrat Inayat Khan: The Way of Illumination”, p.307, Library of Alexandria