The soul is the seed, the core around which the psychic being develops through an evolutionary process. In essence they are one and the same. To realise the psychic being is to realise the soul. But there is the individual central being that is beyond Time and Space. Realising the central being follows a little later and when that happens one becomes conscious of one’s work upon earth. The Self or the Atman is the same for all.
Affectionately,
Alok Da