1)
What is one?
1.
Ramban: There is one way for everyone.
2.
Metzudas David: Bildad said that Tzadikim's afflictions are for the good, but Resha'im's afflictions are not. No - they are the same.
3.
Malbim: There is no Hashgachah. There is one conduct due to the Ma'arachah.
2)
Why did he say "Tam v'Rasha Hu Mechaleh"?
1.
Ramban: Hashem does not oversee to distinguish them, for man is far inferior to Him.
2.
Metzudas David: Evil eradicates both of them; good does not come from evil.
3.
Malbim: The conduct due to the Ma'arachah does not distinguish between good and evil. It eradicates Tzadik and Rasha. Loss is inherent in physicality, for all.
