What do we learn from "Al Tosif Al Devarav"?
Megilah 7a: "Shlomo said 3000 parables"; he wrote those said with Ru'ach ha'Kodesh 1 .
Malbim: Do not say about these matters (creation and Ma'ase Bereishis) from your Sechel.
7a: Do not say that they were not from Hashem, and he chose to write some of them.
What is the meaning of "Pen Yochi'ach Becha v'Nichzavta"?
Rashi: He will rebuke you to your face - via your addition, you came to sin, and all the more so if you detracted [you surely sin]!
Malbim: They will show that you do not know even yourself, how you were created - the details of your limbs, and how they are tied to each other, and how the Nefesh is tied to the body. All the more so, if you will dare to speak exalted matters - the building of the world and how it came about, v'Nichzavta (it will be revealed that you made a shelter of lies - you fabricated Sheker without any substance).
