Letters of Sri Aurobindo
04. The Foundation of Sadhana
Fragment ID: 1129
Quiet is rather negative – it is the absence of disturbance.
Calm is a positive tranquillity which can exist in spite of superficial disturbances.
Peace is a calm deepened into something that is very positive amounting almost to a tranquil waveless Ananda.
Silence is the absence of all motion of thought or other vibration of activity.