They are the ordinary nurseries of faith. Every family, is in a sense, a seed-bed, a seminary. Parents, God calls us to disagree with the world, and with society around us from time to time. Actually, a lot. And one of those areas is in terms of priorities.
Spiritual life is simply too important to postpone.
Neither should we leave it up to the choice of our children, as if they somehow had escaped the curse of the Fall, and were so inherently good, that they will automatically choose the good. The Word of God says otherwise. God has given us much in our families. Jesus understands them. So let's grow closer to God and His Word, and see Him at work in ours.