Deuteronomy 11:18-20 Therefore shall ye lay up these words of mine in your heart and in your soul, and bind them for a sign upon your hand, that they may be as frontlets between your eyes. And ye shall teach them your children, speaking of them when thou sittest in thine house, and when thou walkest by the way, when thou liest down, and when thou risest up. And thou shalt write them upon the door posts of thine house, and upon thy gates.
We can become forgetful, so we need constant reminders of the Law and the Gospel of God’s words. We do not come to faith in Jesus one time and that’s good enough for the rest of our life. We may be saved, but the power of the Gospel doesn’t affect our lives unless we are continually in the Word. The Word and the Spirit change lives.
Therefore, we respond to grace by laying it up in the heart and in the mind, will, and emotions. We meditate on the words of God and their meaning day and night; we memorize Bible verses; we study the Scriptures; we pray together in the family circle; we assemble together to hear the Gospel weekly; we read, mark, learn, and inwardly digest the Word daily; we attend Sunday school and Bible study regularly; and we teach these words.
All of these activities are a routine part of the normal Christian life. Doing these things does not make one a Christian (Jesus does), but it is how the believer responds to grace. He believes that his faith must be maintained and strengthened through the gospel, bathed in the Word, and reminded again and again.