All buddhas' compassion and sympathy for sentient beings
are neither for their own sake or for others.
It is just the nature of buddha-dharma.
Isn't it apparent that insects and animals nurture their offspring,
exhausting themselves with painful labors,
yet in the end have no reward when their offspring are grown?
In this way the compassion of small creatures for their offspring
naturally resembles the thought of all buddhas for sentient beings.
Zen Master Dogen, From:Moon In A Dewdrop, North Point Press