We live on a planet within a solar system that contains two planets that our planet can fit inside; there is a star at the center which could fit many Jupiters inside of it. There are stars that dwarf our very own sun, and there are suns that dwarf those suns. Our solar system rests inside of a galaxy. This galaxy houses many solar systems. There are other galaxies, some potentially larger than our own galaxy. These galaxies reside within a vast Universe. In the grand scheme of things, there doesn't need to be a meaning to life. It doesn't matter in the end. The best you can do is pass on your experience and knowledge to the next generation.