Toldot 5775

At the very end of the parsha, the posuk mentions that Rivkah is the mother of Yaakov and Esav. If this is something we have known since the beginning of the parsha, why is the posuk repeating it? Rashi notes that he doesn't know what this is coming to teach. Some commentators explain that Rashi did not like the possible answers given. My rebbe R' Shmulewitz explains that Rashi is teaching us a valuable lesson: It is ok not to know an answer. One should not be embarrassed to admit a lack of knowledge. This creates a sense of humility within a person and encourages him/her to seek the truth.