"Above all else guard your HEART for everything you do flows from it." Proverbs 4:23
From a very early age, we have to begin speaking to the heart of our children. From our heart flows everything, whether good or bad. While they are still in the womb we should be reading Scripture to them, singing praise songs to God and speaking of the wonderful things that God has done.
I loved that they pointed out that teaching our children a Biblical worldview begins in our marriages. The way we live as husband and wife before our children shows them what we really believe. It also shows them how we view Christ and the church, as that is what marriage is a picture of. Our actions teach them more than our words.
We also must die to ourselves and teach them to do the same. Christ calls us to die to our own way and to live in light of the cross. The Bible must be our first go to so that we can train them in what God says, not just what we think. Read and pray Scripture over your kids so they will have it in their hearts.
Training a child's heart is so difficult, as we know how evil our own hearts are. Pray for strength and guidance to do this well and trust that God will do the rest in bringing them to salvation.