Spiritual things are spiritually discened.
The natural man receives not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.
A natural man’s understanding is shut to them,...must be opened by a divine power,.... and a superior spiritual light must be thrown into it;.....at most he can only know the literal and grammatical sense of them,....or only in the theory,... notionally...and speculatively,.... not experimentally, spiritually, and savingly.
“Spiritual things are spiritually discened.”
Not scripture.
“The natural man receives not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.”
Also not scripture.
“A natural man’s understanding is shut to them,...must be opened by a divine power,.... and a superior spiritual light must be thrown into it;.....at most he can only know the literal and grammatical sense of them,....or only in the theory,... notionally...and speculatively,.... not experimentally, spiritually, and savingly.”
Also not scripture either.
Jesus provides a concrete answer to this question:
Matthew 7:16-20
“By their fruit you will recognize them. Do people pick grapes from thornbushes, or figs from thistles? Likewise, every good tree bears good fruit, but a bad tree bears bad fruit. A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit. Every tree that does not bear good fruit is cut down and thrown into the fire. Thus, by their fruit you will recognize them.”
Now is it a coincidence that God commands man to ‘be fruitful and multiply - fill the earth and subdue it?’
Like Jesus says - by their ‘fruits’ you shall know them. These are not two separate issues they are one and the same.