Chapter 8 talks about what happens at the end of life. Krishna says that whatever a person thinks about most, they move toward.

That can sound heavy, but the idea is simple. What we think about again and again shapes who we become. If someone spends their days thinking about money, they become a money-focused person. If someone thinks often about kindness, kindness becomes part of them.

Our last thoughts don't appear out of nowhere. They grow from the thoughts we practiced all our life. That is why Krishna says to remember the highest, God or goodness, at all times.

Notice that he also says "and fight." He doesn't tell Arjuna to stop working and only pray. He means: do your duty, and keep the highest in your mind while you do it.

For a student, it might mean doing homework while remembering why learning matters. For a grandparent, it might mean a short prayer while cooking, or humming a bhajan, a devotional song, while doing chores.

You become what you practice thinking. So it's worth choosing what to practice.