"Thy word have I hid in my heart that I might not sin against thee."
This Old Testament scripture has been used to promote the practice of scripture memorization. That might have been helpful under the Old Covenant since believers didn't have daily access to the scriptures. The only time they got to hear them read is when they went to the synagogue on the sabbath.
Today, however, we live under a new covenant. We no longer need to go to a building in order to hear the word of God read because he now lives in us. Jesus is the Word of God and, when he comes to live in us, he sets us free from sin. As we become more aware of his life in us, our tendency to sin diminishes.