Ishikawa Takuboku's サルと人と森 (English version in the works)

A man walked into a forest. A monkey was sitting on a branch of a tall tree, watching the man. -- We monkeys are humanity's ancestors. I wonder why people look down us. The man replied, -- We humans are different from monkeys, we're more intelligent. If we are descended from apes, then where does our heroic nature come from? The monkey: -- If that is so, how can humans be such pitiable creatures? It seems to me that humans have already forgotten the past. How do you happen to be here in the first place if not for sharing a common ancestry with us? Those who forget the past have no future. If you really believe yourselves to be the most advanced, the most amazing creatures, you'll know no happiness in the future.