Everything Changes
Don't expect everything in your life to remain the same. Humanity is just a symbol for a greater concept: metamorphosis. Societies evolve, animals too, heck even the earth evolves. But nothing compares to the evolution that occurs within our relatively short lives. Sure, as a species we are just a niche aspect of the universe. However, our lives are so complex that change is what defines us. Nothing really stays the same. Sure, you can retain some aspects of your childhood when you become an adult, but just think about how different the two lives are. When you are in your teenage years for example, you have no clue who you are going to marry, or any idea about your future kids. Family is such an integral part of our culture and to be clueless about it at any age is frightening, because everything changes, in a matter of seconds. No one ever knows what life has in store; we just have to continue to adapt and evolve and make the best of what we have.