Dogen (1200-1253) is one of the greater realizer poets of all the traditions. He was the founder of the Soto Zen School. More about his life here.
Treading along in this dreamlike, illusory realm,
Without looking for the traces I may have left;
A cuckoo's song beckons me to return home;
Hearing this, I tilt my head to see
Who has told me to turn back;
But do not ask me where I am going,
As I travel in this limitless world,
Where every step I take is my home.