What does the last sentence of Three-body mean?

"Three-body" finally wants to tell people a truth: even if fate is like this, we still have the right to resist, and this kind of resistance is our "fate" and it is worth our life. So, death is not terrible. The terrible thing is that we accept this death numbly and leave in a daze.

If death is the inevitable fate of all things, then the existence of struggle is the most powerful resistance to this fate from the time this thing comes to this world to the time it leaves this world. Even if nothing can be left in the end, we still have to work hard to create more now!

Brief introduction of three-body

Ye Wenjie used the sun as a megaphone to send a signal to the universe, which was received by three aliens. Because their home planet has three suns. For some reason, these three suns are unstable and easy to collapse. Three people are preparing for interstellar migration, but the universe is so big that at first glance, it is dark everywhere, and I don't know where to immigrate. So the three-body got thousands of space stations to monitor signals and see if there are any signals that can be connected.

Because the signal sent by Ye Wenjie was received by the three emperors, the three emperors intended to invade the earth, which led to the life-and-death struggle between human civilization and the three emperors' civilization and the rise and fall of the two civilizations in the universe.