I know what I know

Friends, the following was a part of The Writer's Almanac today. The whole poem is really good, so if you are interested in seeing it, click the link above. However - these last few lines really stood out to me and I felt the need to post them here for you to see. It's stunning!

Goodbye good friends. Alas,
some goodbyes are like death;
they bring the heart to earth
and teach it how to die.
Earth, here we come again,
we're going out to grass.
Think of us now and then,
we'll think of you. Goodbye.

From: "Farewell to Teaching" by George Johnston, from The Essential George Johnston. © The Porcupine's Quill, 2007.