1 John 2
He that saith, I know Him (Christ), and keeps not his commandments, is a liar, and the truth is not in him. [1 Jn. 2:4]
Obedience is critical. When a parent teaches a youngster that if they touch fire, they will be burned bringing pain and skin damage. Obedience to God similarly helps us avoid life pain and damage.
The earlier children learn this lesson, the better. A grossly disobedient adult is a sad picture. Not only do they incur pain and damage to self, they share it with those who love them.
God’s great grace is the ONLY SOLUTION.