Eliyahu Safran: My grandfather references the well-known posuk (in Devarim 17:11) where we are told to always and without exception follow the decisions of the beth din (court), even if "you are convinced that they are wrong." Rashi tells us that even if the court seems to be saying that "right is left, and left is right," still we must listen.
From this my grandfather divined the lesson that we are not to stray from what our elders/chachamim teach us. Their word is God's word. We follow the Beth Din because God agrees with the Beth Din. We may not "get it" but in due time the wisdom and truth will become evident.
The last word always belongs to the beth din. God, His Torah and its legitimate interpreters.