What happened to the spiritual side of healing? Jesus healed epilepsy, blindness, deafness, muteness, mental illness, etc. often by casting out demons, evil spirits & unclean spirits. Has humanity traded faith for knowledge?

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Scripture Text & Textual Evidence
Matthew 17 Manuscript Evidence
This explains why Matthew 17:21 appears in some traditions and not others (Old Latin, Vulgate, early church fathers, and manuscript variations). https://biblehub.com/q/Evidence_for_Matthew_17_21_in_history.htm
A detailed look at which translations include or omit Matthew 17:21 and why.  ...