As the spider comes out with its thread, or as small sparks come forth from fire, thus do all senses, all worlds, all Devas, all beings come forth from that Self. The Upanishad (the true name and doctrine) of that Self is 'the True of the True.' Verily the senses are the true, and he is the true of the true.

In plain words: Agatasatru teaches that just as a spider spins out its thread and sparks fly up from a fire, all senses, worlds, gods and living beings come out of the Self. The Self's secret name is "the Truth of the truth": the senses are real, but the Self is even more real than they are.