As you read these stories you will see that whenever I was properly humble and willing to let something besides a human be my instructor, these various four-legged, six-legged and no-legged fellows shared priceless wisdom with me. They taught me that perfect understanding and perfect co-operation between the human and all other forms of life is unfailing whenever the human really does his required part.

Foreword to Kinship With All Life (Harper & Row, 1954), ISBN 0060609125)