自然选择是残酷的。
Natural selection is cruel。
"The only true voyage of discovery, the only fountain of Eternal Youth, would be not to visit strange lands but to possess other eyes, to behold the universe through the eyes of another, of a hundred others, to behold the hundred universes that each of them beholds."
The most effective debugging tool is still careful thought, coupled with judiciously placed print statements.
You can turn over a new leaf every hour if you choose.