I have said that if one has the principle of surrender and union in the mind and heart there is no difficulty in extending it to the obscurer parts of the physical and the subconscient. As you have this central surrender and union, you can easily complete it everywhere. A quiet aspiration for complete consciousness is all that is needed. Then the material and subconscient will become penetrated by the light like the rest and there will come in a quietude, wideness, harmony free from all reactions that will be the basis of the final change.
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When the psychic being and the heart and the thinking mind have surrendered, the rest is a matter of time and process—and there is no reason for disturbance. The central and effective surrender has been made.
[Sri Aurobindo: Letters on Yoga]