One of the biggest responsibilities that we have as fathers is to develop a passion for God in our children. That being said, the Bible has a lot to say on the topic.
That this may be a sign among you, [that] when your children ask [their fathers] in time to come, saying, What [mean] ye by these stones? – Joshua 4:6
And Gideon said unto him, Oh my Lord, if the LORD be with us, why then is all this befallen us? and where [be] all his miracles which our fathers told us of, saying, Did not the LORD bring us up from Egypt? but now the LORD hath forsaken us, and delivered us into the hands of the Midianites. – Judges 6:13
For he established a testimony in Jacob, and appointed a law in Israel, which he commanded our fathers, that they should make them known to their children: – Psalm 78:5
God was constantly having the children of Israel place markers so that they would remember what He had done. He then instructed the fathers to impart that knowledge in the house, by the way, etc. That’s why you see in the Joshua passage that children would ask their fathers– because they were supposed to know what happened.
We see in Judges that the fathers did impart the facts, but as I get older, I’m more aware that it’s not just the facts that our children need to know. They have to internalize the facts, and develop a desire and passion for God that comes out of them. It’s not enough to know that Jonah was in the belly of a fish and lived, that time stood still, or that Jericho’s walls fell down with the children of Israel just walking around it.
Kids see spectacular things on television that are make believe, why should they choose to follow another story just because you claim it is true? Certainly they believe what they have seen easier than that which they have not. And therein lies our greatest resource– they need to see the Christian life lived in us. They need to see us passionate about Him. They need to see us dads depending upon God and seeing His blessing. They need to see the principles of the Word of God at work in our lives. If we make the truth unpalatable, we’ve failed in the task of imparting our faith in God to our children.