Therefore, memorize how to analyze the aggregates to understand them. When traveling to the forest, during business dealings, or while riding in vehicles, contemplate the aggregates. Take the book with you, and when you're reading it, is studying the aggregates wholesome or unwholesome?
Oh - when reading, these are wholesome mind states. Can unwholesome thoughts enter at that time? Reading the book generates wholesome thoughts, do you understand? Once you've memorized it, do you still need to carry the book? Recite while riding in cars, recite while flying in planes. Even if you unfortunately die in a car accident, if you die with a wholesome mind state, you'll become a deva or be reborn as a human, do you understand?
Isn't this worth examining?
These are wholesome mind states occurring. If you die mindlessly thinking about buying and selling without understanding this, then a lower realm rebirth is certain. That's because you died with an unwholesome mind state. So memorize how to analyze the aggregates. If you haven't mastered it yet, when you study, it generates wholesome mind states. Can unwholesome states arise then?
If you travel with intention and faith while reciting, even in forests known for ghosts - speaking conventionally - guardian deities always protect you. The guardian deities of the Buddha's teachings protect you. The righteous deities protect you, do you understand? Don't wholesome mind states arise then? Can wrong beings attach to you? Wrong beings cannot attach, you see. Green ghosts and hungry ghosts are wrong beings. The righteous deities and guardians of the teachings are right beings, do you understand? There are also personal guardian deities. Personal guardian deities ward off both harmful and beneficial spirits. Isn't this worth studying? This is why we need to know how to make wholesome kamma.
Now, those who haven't yet achieved understanding should strive to achieve it, and those who have already understood should complete the essential task by contemplating the Noble Truths."