This is one of my favorite quotes. I used it every year when I was still in the classroom. The quote, one of four in the "Wise Men" set, was stamped in Versamark ink and embossed with fine-line powder.
This type of card is called a Criss Cross card. Instructions for how to make one are here.
I added a little pull tab on the card that goes inside the pocket for easy access. I also did stitching around the edge of the sentiment and the pull tab.