Happier and Light Hearted

I want to know where this came from, I found it somewhere a long time ago and saved it, I know that where ever I found it got it from tumblr, but it's the words I'm more interested in. Where did they come from? And how do you become that gosh darn poetic?

Quoting

"This moment contains all moments."

Thank you C.S. Lewis, for giving me such a grand thing to think about, your words have been stuck in my head since the moment I first read them.