A peacock is the symbol of spiritual victory.
Peacocks are the powers of victory, the victory of the energies of light over the energies of darkness.
The peacock signifies victory in yoga, the divine victory.
The experiences you relate mark a great progress — the passage from the perception of the ascending Force to that of the descending Shakti. For the spiral coils of Light you saw and whose effects you felt — the merging in silence and peace, the peace of the Atman or the Brahman consciousness — are usually a first effect, they are visual forms of the dynamic descent of the Divine Force from above; also the passage from the realisation of the static Brahman with the sense of the unreality of the world-existence to the realisation of the status of the dynamic one. This is a considerable step in the integral yoga.
The Self or Atman is inactive; Nature (Prakriti) or Shakti acts. When the Self is felt it is first an infinite existence, silence, freedom, peace that is felt -- that is called Atman or Self. What action takes place in it is according to the realisation either felt as forces of Nature working in that wideness, as the Divine Shakti working or as the cosmic Divine or various powers of them working. It is not felt that the Self is acting.