I thought this word trail was very interesting.
In 2 Corinthians 13:9, Paul told the Corinthian church "... we also pray that you will become perfect" or, "we pray for the perfection of you".
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The word for "perfection" is "katartisis: a perfecting, making fit.. only used in 2 Corinthians 13:9, (a training, disciplining, instructing)."
"From katartizó: to complete, prepare ... to complete, prepare
Usage: (a) I fit (join) together; met: I compact together, (b) act. and mid: I prepare, perfect, for his (its) full destination or use, bring into its proper condition"
"From kata: down, against, according to, *down from*.."
This is amazing! These words saying it's all grace! And humility.. HE will perfect. And it's all "down from".
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"– properly - down from, i.e. from a higher to a lower plane, with special reference to the terminus (end-point) .. 2596 /katá (bring down exactly, complete) is opposite to 303 /aná (to bring up to completion)."
"Usage: gen: against, down from, throughout, by; acc: over against, among, daily, day-by-day, each day, according to, by way of."
"..to perfect, complete, prepare"
https://biblehub.com/interlinear/2_corinthians/13-9.htm - #2676 katartisis / katartisin