When Tzelafchad’s daughters told Moshe that their father was not part of Korach’s rebellion (27:3), which was a personal attack against Moshe, how could Moshe possibly judge their case impartially, knowing that Tzelafchad had been one of his own supporters? For this reason, Moshe was forced to bring their case directly “before God” (v. 5), to obtain an unbiased verdict.
This teaches us a powerful lesson about the human susceptibility to bias. Moshe was God’s faithful servant whom He deemed worthy to transmit the Torah to all future generations. The only “vested interest” Moshe could have here was that the person involved did not participate in a rebellion that occurred 39 years previously. Nevertheless, this was considered sufficient grounds for Moshe not to desire to judge the case himself due to a person’s natural tendency to bias!
Here we see, once again, the importance of always involving a third party when making personal decisions, so as to negate the influence of personal bias.
(Based on Sicha of 3rd Night Of Succos 5747)