Paul's BOAST was in "the CROSS of ... Christ"
ALONE (Galatians 6:14):
Paul was "NOT ASHAMED" of "the GOSPEL of
Christ: for it is the POWER of God unto SALVATION" - "to every one that BELIEVETH" (Romans 1:16),
i.e "unto them which are CALLED" (I Corinthians 1:24)
However, "unto THEM which are CALLED" of "both
JEWS and GREEKS" - "CHRIST CRUCIFIED" is both "the POWER of GOD, and the WISDOM of GOD"
(I Corinthians 1:23-24)
For Paul, the CROSS FOCUSED BELIEVER - he declares that
"the WORLD is CRUCIFIED UNTO ME, and I UNTO the WORLD (Galatians 6:14):
For it is "the SAINTS in LIGHT" (Colossians 1:12)
who have been "DELIVERED ... FROM the POWER of DARKNESS ... INTO the KINGDOM of the SON of HIS LOVE"
(Colossians 1:13 cf.Acts 26:18)