What if we were creatures with a grand purpose. The things we do, say, and interact with all affect us. With the logic of "it is just to live" that makes us sound like we are not sentient, like we are programs or robots. We can see the world, understand the universe, and even with our many flaws we come together.
The question asks "Do our lives have purpose?", but the answer isn't very easy because the question is asking two things. What purpose do our lives have, and then to who? I mean do you really live your life for just yourself? If that was the case why are there so many stories of sacrifice? Why do people even bother to risk our lives to help strangers?
People think so negatively of humans, but they don't give enough credit. We actually do things that go against our nature, our instinct. We have the ability to give our lives purpose to anyone and everyone in the world. This ties in with the statement about fate I made on the first post. One single comment can change a life, one single kind gesture can make a day. (I have one example. We had gone down to the beach (my family and I) and there was this married couple. All I said was, "you guys have a pretty strong relationship, you guys must be so happy" and I thought nothing of it (I'd actually forgotten saying it the next day) though that couple took it to heart and said that it made them much stronger. After we got home my mother had told me how happy the statement had made them.) The point is, the words seemed to have no purpose, but even something that small (to me) was quiet important to someone else.