Contrast

I know nothing but all. I am small but stand tall. I am wrong but never. I am worse but better. I can climb but fall. I could walk but I crawl. I am weak and strong. I can fight but not for long. I am normal but weird. I'm free but steered. I'm myself but swim with the sea. I am influenced but me. I'm my future and my past. I am known but won't last. I'm slow but forgotten fast. I am a contrast.