Caravaggio, Saint Jerome Writing (c. 1605), Galleria Borghese. Public domain.
3 verses in the King James Version. Word study for “understanding” →
The eyes of your understanding being enlightened; that ye may know what is the hope of his calling, and what the riches of the glory of his inheritance in the saints,
Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart:
Wherefore be ye not unwise, but understanding what the will of the Lord is .