An other worldly-proof.
At the height of my spiritual oppression in the past (more than 5 years ago), the demons (who spoke to me) tried to ‘reason’ with me to “deny” the Trinity.
These were the “same” cluster of demons who “threatened me with eternal hell” at one time as well as “there is no punishment in the afterlife type ideas” at another time or “other fearful consequences vs special privilege to sin type ideas”…
All so that I’ll stop believing the “Truth” that “Lord Jesus Christ Will Save the Whole World” long after needful “corrections, punishments & righteous judgments in the afterlife” (part of the Secret or Mystery of Christ in God which ends with God in Christ Saving the world by reconciling & restoring “all things” — those which are “sin-laden” among His Creation to Himself).
I noted something (retrospectively) on this “evil spiritual encounter”. The demons never once spoke or could use any “statements which are true” and try to use that instead to deceive me when they spoke directly to me.
Hence, after the Lord Saved me from these demonic oppression & voices back then, Wisdom allowed me to perceive that the “Truth about Lord Jesus Christ” was exactly the “opposite” to what the demons wanted me to believe & share.