THIRTEEN] SECURING OUR ALLIES 
through the skies. It is not uncommon to find 
strong friendships growing up among our domestic 
animals. A Morgan mare in my stables became so 
deeply interested in a Leicester sheep that she 
would share her hay and provender with evident 
pleasure. Billy would jump into an adjacent man- 
ger, and with common sense take no more than his 
half. Each one would pull a mouthful from the 
hay, and then draw back to give the other a chance. 
It is altogether misleading to talk of the struggle for 
existence as a principle covering all that is going 
on throughout animate nature. The spirit of mu- 
tual aid is quite as general as the struggle for 
existence. 
Our highest moral life is reached in that altruism 
which makes our responsibility broad enough to 
secure the happiness of inferior animals. This 
duty widens into religion, when we recognize the 
fact that we are children of God only as we are 
divinely good and coéperators with the Creator. 
This cooperation gets to be a very important part 
of human evolution. We have to learn, above all, 
to distinguish those creatures that can be made 
compeers, assistants, or collateral workers. The 
whole of human history contains no fact more re- 
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