Why do they say "Lo Yitachen Derech Hashem"?
Rashi (29 1 ): This is like Lo Yitaken with a Kuf (His way is not proper).
Radak: It cannot be like you say, that his first deeds will not be recalled.
Radak citing Targum Yonasan: Hashem's good way is not clear to us.
Malbim: They do philosophical investigation, and say that Hashem's way changes, from desiring the Tzadik and hating the Rasha. Via the change of deeds, His desire changed!
Rashi commented on verse 29, but surely the same applies here. (PF)
Why does it say "ha'Darki Lo Yitachen"?
Radak: How can you say that My way cannot be? Just the contrary, your way cannot be! A man is judged only based on his latter deeds, for he regrets the former.
Malbim: They also ask, if a worker ruined his work, how can he fix it via regret? Also oppositely - if one worked faithfully for many years, and ceased to work, will he not be paid for the work that he did?! Hashem answers, My way does not change. I want to benefit one who is prepared to receive good. A Rasha ruined his ways, and stops himself from receiving Divine influence of good, just like one who did not seed his land will not receive the benefit of rain. The difference is not in the rain, rather, in the man. When he repents and seeds for Tzedakah, he is prepared to receive Hashem's good influence, which is constant. A Tzadik who began to do evil, he ruins what he seeded for Tzedakah. He did evil (withheld the influence); evil does not come from Hashem - "Ki Lo Machshevosai Machshevoseichem; ... Ki Ka'asher Yered ha'Geshem veha'Sheleg" (Yeshayah 55:10).
