Are we analyzing some 19th century philosophy treatise for grammar here, by any chance ? Caveat: this way madness lies ;-)
Anyway, holding this text to standards of 21th century grammar and usage:
I would expect "aussprechend" in place of "aussprechendes" here
So would I.
Is the sentence, as it stands, grammatically correct?
No. "aussprechendes" is wrong.
Additional nitpicks:
One would not write "mit einem Anderen" but "mit einem anderen" ( ".. Menschen" is implied, therefore lowercase)
"über etwas Sprechen" is also wrong.
Either it is an infinitive phase and lowercase
- "Wir müssen über etwas sprechen"
or the verb is meant to be used as a noun, in which case one would concatenate and capitalize the qualifiers
- "das Über-Etwas-Sprechen"
Oh, and
voll gesehen
Not incorrect as such, but .. yeah ... no. You would not hear that in a conversation.