Most certainly you ought; at least half a dozen every day. The more you learn by rote, the more you will be able to learn. If you get six verses every morning, for one year, you will have learned more than two thousand verses, or more than sixty chapters. But this is not all. At the end of the year, it will be as easy for you to commit twenty verses to memory, as it is now for you to commit half a dozen. The best plan I know of is to learn your verses partially just before you prepare to go to bed. Think of them as you are falling asleep, repeat them as you wake the next morning; and after your morning devotions, learn them perfectly. This you will find, was the advice of the ancients, and if you lay to heart what you learn, it will be the greatest treasure. Nobody can rob you of it. You may he shipwrecked, or robbed, or imprisoned—but no one can take this out of your memory.
– James Alexander, My Brothers Keeper