I feel like Arjuna, because I was complaining about a task that I needed to do, but didn’t want to. My dharma was to go to school, just like his dharma was to go into battle, We both had reasons why we didn’t want to complete these tasks, but we did anyways because it was our dharma, and in the end things turned out good for us.
The Bhagavad Gita explains that we all have duties that we don’t want to do, but we have to fight through that because it’s our dharma to do them. The Bhagavad Gita also explains that good karma will come to those who follow their dharma.
People in ancient India had different motives for doing their duty then people today. People today have different motives, such as they need to do something for a boss, or to keep themselves healthy, or something tho their own benefit. But, people from ancient India wanted to have good karma, therefore they have to complete their dharma. Having good karma is their motivation.
Only certain people would be able to read it, because the richer and more higher up people were only able to read. Since this is true, the people that are higher ranked could tell lesser ranked people that can’t read that they have these “duties” but they are simply just made up in order to get the lesser ranked people to do what they want.