looking for alaska

" Those awful things are survivable, because we are as indestructible as we believe ourselves to be. When adults say, "Teenagers think they are invincible" with that sly, stupid smile on their faces, they don't know how right they are. We need never be hopeless, because we can never be irreparably broken. We think that we are invincible because we are. We cannot be born, and we cannot die. Like all energy, we can only change shapes and sizes and manifestations. They forget that when they get old. They get scared of losing and failing. But that part of us greater than the sum of parts cannot begin and cannot end, and so it cannot fail. "

That is a quote from Looking for Alaska by John Green. He is a fabulous authour, and you should read his works.