Maybe he would write in a poem how 'everything is new under the sun'. Every minute, or rather every second, every fraction of a second, the world is changing. Even today's sun is a little bit different from that of yesterday."
You are very correct as the goes by so also does changes emerge. One you think you know today will become an outdated knowledge by tomorrow.
Thank you for your reply @meritigbunu,
All knowledge is here, always and everywhere. All that is needed to obtain it, is focus, attention and observance ;-)