It is to find significance, perhaps at several levels, beyond superficial appearances. It entails a sense of the significance of existence, of connectedness, of purpose. That which is neither known, perceived, nor encountered, which is completely unconnected from ourselves in every sense, cannot exist for us. Experience is the necessary connection between reality and meaning. Speculating in the abstract, about that which we have not experienced is worthless.
Experience includes perception of physical phenomena, and is the basis for science.
But perception does not exist apart from psychological activity. If experience is the necessary bridge between meaning and reality, the method of pleromatics must revolve around taking the measure of experience. The preferred method for measuring the physical world is of course the scientific method. It is serving us well, and has yielded the explosive expansion of knowledge which we have seen in the twentieth century. But the expansion of knowledge is but one aspect of the expansion of consciousness, and as twentieth century experience shows, does not itself provide an adequate basis for meaningful relationship to the nonlocal reality which science itself now affirms.