VIII. Concerning the Guardian of the Threshold and some Peculiarities of Clairvoyant Consciousness
In order to understand clairvoyant experience, especially in its early beginnings, it is particularly important to bear in mind that the soul may already have begun to live in the supersensible world before it is able to formulate to itself any knowledge worthy of the name. Clairvoyance at first appears in a very subtle way, so that often, inasmuch, as they expect to see something almost tangible, people do not heed clairvoyant impressions which are flitting by, and will in no way recognise them as such. In this case the impressions sink into oblivion almost as soon as they appear. They enter the field of consciousness so slightly that they remain quite unnoticed, like tiny clouds on the soul's horizon.
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ENGPP1922