A deep, intense or massive substance of peace and stillness is very commonly the first of its powers that descends and many experience it in that way. At first it comes and stays only during meditation or, without the sense of physical inertness or immobility, a little while longer and afterwards is lost; but if the sadhana follows its normal course, it comes more and more, lasting longer, and in the end an enduring deep peace and inner stillness and release becomes a normal character of the consciousness, the foundation indeed of a new consciousness, calm and liberated.
<ref>http://incarnateword.in/cwsa/30/descent-and-other-kinds-of-experience#p7</ref>
=How to Practice Stillness?=
So the thing to be done is to remain very objective within that peace; then you can benefit from the peace without accepting its limits. And, this cannot be done without an uncompromising abolition of the ego-sense at its very basis and source. This, if persistently done, changes in the end the mental outlook on oneself and the whole world and there is a kind of mental realisation; but afterwards by degrees or perhaps rapidly and imperatively and almost at the beginning the mental realisation deepens into spiritual experience—a realisation in the very substance of our being.There is no need to struggle, just remain turned upward.One commences with a method, but the work is taken up by a Grace from above, by a response from That to which one aspires or by an irruption of the infinitudes of the Spirit. Even if a thousand images or the most violent events pass across it, the calm stillness remains as if the very texture of the mind were a substance of eternal and indestructible peace.
<ref>http://incarnateword.in/cwsa/23/the-release-from-the-ego#p8 </ref><ref>http://incarnateword.in/agenda/04/april-16-1963#p3</ref>
==What Must One keep in Mind?==
It is not, for instance, only by an effort of the mind itself to get clear of all intrusive emotion or passion, to quiet its own characteristic vibrations, to resist the obscuring fumes of a physical inertia which brings about a sleep or a torpor of the mind instead of its wakeful silence, that the thing can be done. <ref>http://incarnateword.in/cwsa/28/philosophical-thought-and-yoga#p15</ref>
==Challenges Faced==
But, even in this repose of all thought movements and all movements of feeling, one sees, when one looks more closely at it, that the mind-substance is still in a constant state of very subtle formless but potentially formative vibration—not at first easily observable, but afterwards quite evident—and that state of constant vibration may be as harmful to the exact reflection or reception of the descending. <ref>http://incarnateword.in/cwsa/28/philosophical-thought-and-yoga#p17</ref>
=Yogic Understanding of Stillness=