Spirit and Mind

The next quote from Reality is a bit longer then the first few and its form is more like a science talk than poetry. Some folk feel that Spirituality and Science are forever-antagonistic fields. I feel this quote puts that feeling to a test...

“The logical proof of the immortality of the spirit is this, that no sign can
come from a nonexisting thing -- that is to say, it is impossible that from
absolute nonexistence signs should appear -- for the signs are the
consequence of an existence, and the consequence depends upon the
existence of the principle. So from a nonexisting sun no light can radiate;
from a nonexisting sea no waves appear; from a nonexisting cloud no rain
falls; a nonexisting tree yields no fruit; a nonexisting man neither
manifests nor produces anything. Therefore, as long as signs of existence
appear, they are a proof that the possessor of the sign is existent.”

‘Abdu’l-Bahá

We seem to have a logical statement that shows that, if we see "Signs" of our Souls or Spirits, the Sign itself proves the existence of the Spiritual entity...

What are your thoughts?