foolishness

Job 14:4
Who can bring clean out of unclean? No one!

Psalm 51:5
Surely I was brought forth in iniquity; I was sinful when my mother conceived me.

John 3:6
Flesh is born of flesh, but spirit is born of the Spirit.

Ephesians 2:3
We all lived among them at one time in the cravings of our flesh, indulging its desires and thoughts. Like the rest, we were by nature children of wrath.

but

Proverbs 13:24
He who spares the rod hates his son, but he who loves him disciplines him diligently.

Proverbs 19:18
Discipline your son, for in that there is hope; do not be party to his death.

Proverbs 23:13, 14
Do not withhold discipline from a child; although you strike him with a rod, he will not die. . . .

Proverbs 29:15, 17
A rod of correction imparts wisdom, but a child left to himself disgraces his mother. . . .

Hebrews 12:10, 11
Our fathers disciplined us for a short time as they thought best, but God disciplines us for our good, so that we may share in His holiness. . . .