When you began to meditate, you saw the Mother’s face; that is very good,it means that there is an inner connection established. The absence of the smile does not mean that she is displeased or that you have done anything against her will. At the same time the Mother’s force descended on you, it was the pressure of her Force that you felt on the head and breast—everybody feels in the beginning this pressure—and what you felt in the breast was the working of the Force. In the Yoga these are signs of the action of the Yoga and you must observe quietly what happens without getting disturbed, remembering the Mother always and trusting in her action upon you.
Ref: The Mother with Letters on The Mother