Dawn always means an opening of some kind, the coming of something that is not yet fully there.
The inner silence and peace have first to be established. Silence does not mean absence of experiences. It is an inner silence and quietude in which all experiences can happen without producing any disturbance. It would be a great mistake to interfere with the images rising in you. It does not matter whether they are mental or psychic. One must have experience not only of the true psychic, but of the inner mental, inner vital and subtle physical worlds or planes of consciousness. The occurrence of the images is a sign that these are opening and to inhibit them would mean to inhibit the expansion of the consciousness and experience without which this yoga cannot be done.
You must gather yourself within more firmly. If you disperse yourself constantly, go out of the inner circle, you will constantly move about in the pettiness of the ordinary outer nature and under the influences to which it is open. Learn to live within, to act always from within, from a constant communion with the Mother. It may be difficult at first to do it always and completely, but it can be done if one sticks to it — and it is at that price, by learning to do that, that one can have the siddhi in the yoga.
Thy acts are thy helpers, or events are signs,
Waking and sleep are opportunities
Given to thee by an immortal Power:
So canst thou raise thy pure unvanquished spirit
Till spread to heaven in a wide vesper calm,
Indifferent and gentle as the sky,
It greatens slowly into timeless peace.