For me, it comes down to the meaning that I experience in my life personally, and in the small amount of meaning carried by my actions as they ripple outwards g

For me, it comes down to the meaning that I experience in my life personally, and in the small amount of meaning carried by my actions as they ripple outwards gently towards the distant future -- perhaps touching many people in a small way. If someone, a million years from now, experiences slightly more beauty and understanding in part because of my actions, I find that to be incredibly fulfilling. Even better if they are in another star system!