^18 (A) Memorize these laws and think about them. Write down copies and tie them to your wrists and your foreheads to help you obey them. ¹⁹ Teach them to your children. Talk about them all the time—whether you're at home or walking along the road or going to bed at night, or getting up in the morning. ²⁰ Write them on the door frames of your homes and on your town gates.