does a godly home guarantee godly children?

Short answer: No.

Why do parents feel overwhelmed today?
If you google "godly children" you get more than a million hits. On the top page a church from Illinois (their site meter lists over 3 million hits) will give you their seven keys for raising Godly children. The "Planning" key alone lists more than 50 scriptures and goes on for over four thousand words (14 pages in MS Word). ChristianParents.net gives 50 scripture references, then begins to tell parents in exhaustive detail all the goals we must set for our children, including salvation, confession, fellowship with God, daily growth, mental and psychological stability, respect for parental, political, and spiritual authority, mastery of the details of life (money, job, health, status, friends, social life, possessions, entertainments) INCLUDING "perfect inner happiness in the absence of one or more details of life." I feel tired just typing it in.

All these sites seem to teach that if we just master the seven keys, or fourteen principles, or forty scriptures, then yes, we will raise godly children.

Most Christian parenting resources name and claim Proverbs 22:6 as a central proof of this: "Train a child in the way he should go and he will not depart from it."

Why is this a problem?

1. It gives the authority of a "promise from God" to a proverb; the proverbs were meant to show "how life usually goes."
2. It doesn't take into account that rebellion happens.
3. It makes parents feel like failures (or lets us take credit that isn't fully ours).
4. It creates a false sense of hope for all those kids who don't return to God after running away.

The truth is: We have great influence, but not complete control.

A better scripture for parents is: Proverbs 21:30-31.
"There is no wisdom, no insight, no plan that can succeed against the Lord. The horse is made ready for the day of battle, but victory rests with the Lord."

BF Skinner – type thinking makes us think we can completely control behavior. Scripture teaches us that victory belongs to God. No matter how well we prepare or plan, we can't completely control whether someone will choose to come to, or turn from, God.