Learning is work. There are multiple ways to study. Different study strategies will work differently for each student. Serious students should try all of them several (6-7) times to see how they work when done well. For the best learning, every student will likely need to use more than one strategy and switch between them. Here are some tips relating to studying vocabulary. You can adapt them for memorizing texts.
"The service and worship of the Gospel is to receive good things from God, while the worship of the law is to offer and present our goods to God. We cannot offer anything to God unless we have first been reconciled and reborn. The greatest possible comfort comes from this doctrine that the highest worship in the Gospel is the desire to receive forgiveness of sins, grace, and righteousness" (Apology of the Augsburg Confession, IV, 155:310).