This is from the "St. John Passion" by J.S. Bach. The conductor is the great 20th century interpreter of Bach's works, Karl Richter.
It is a lullaby, really, to the Christ as he's laid in the tomb: "Rest well, sacred limbs."
"In the post-meditative experience become a child of illusion" is a slogan from the Tibetan mind training tradition. We engage the world as we experience it all the while realizing that reality is not as it seems to be.