It is said that in Darash Mose דרש משה Parashas Korach, the following quote can be found from Rabbi Moshe Feinstein zt'l
Korach thought that every Jew is entitled to fulfill the laws of the Torah in accordance with his own understanding. Korach's logic told him that a tallis made of techeiles was exempt from tzitzis, that a house full of seforim was exempt from mezuzah, and that he was entitled to be a kohein. But this is a great error; one must keep the Torah only as explained by the poskim of his time, who possess the traditions and methods of learning passed down from one sage to another throughout the generations. Without this, one is bound to make mistakes, often in the most serious of transgressions. In our long history we have seen many groups of heretics and wicked men who have based their beliefs on some inference from the Torah or the words of Chazal. Only the scholars and sages of the generation are to be entrusted with interpreting the words of Hashem Yisborach.
I've looked, but could not find it. Does someone know where to find this quote?
Also, the quote says "who possess the traditions and methods of learning passed down from one sage to another throughout the generations"- Does this means that you cannot make your own interpretation, since you might make mistakes with the interpretation? What does Rav Moshe mean with this?