Poem Released By Yak Before He Was Killed ?

Do not stand at my grave and weep,
I am not there. I do not sleep.
I am a thousand winds that blow,
I am the diamond glintz on the snow.
I am the sunlight on ripened grain,
I am the gentle Autumn rain.

When you awaken in the mornings hush,
I am the swift uplifting rush.
of quiet birds in circled flight,
I am the soft star that shines at night.

Do not stand at my grave and cry,
Iam not there. I did not die !