But when Jehoiada died

(Thomas Watson, "A New Creature")

"I tell you the truth, no one can see the kingdom
 of God unless he is born again." John 3:3

Religious education is not the new birth. Education
may greatly cultivate and refine nature. King Joash
was good as long as his uncle Jehoiada lived—but
when Jehoiada died
, all Joash's religion was buried
in his uncle's grave!
"Joash did what was right in the
eyes of the Lord, all the years Jehoiada the priest
instructed him." 2 Kings 12:2

Have we not seen many who have been trained up
religiously under their parents, and were very hopeful.
Yet these fair blossoms of hope have been blown off,
and they have lived to be a shame to their parents!

"You must be born again." John 3:7