Muslims, Can anyone reveal any truth that does not come from Muhammad?

Please do not say this prophet or that prophet if it pertains to the Qu'ran as no living prophets words are in the Qu'ran. Please do not say the Qu'ran because it is revealed by Muhammad and did indeed p form him. Is there one truth in all of Islam that does not p through Muhammad? Just one? Is Allah subject to the word of Muhammad? Does this not mean he is weaker than Muhammad as he can not reveal one truth but that which pes through Muhammad?