Responsa su Ecclesiaste 7:35

They responded: Even though non-Jewish wine is forbidden by a rabbinic decree, the Torah is more stringent with issues of idolatry than with any other prohibition, as it is written (Deuteronomy 7:26): "Do not bring an abhorrent thing into your house, etc." Any person who is strict with a decree ordained by the sages will have merit on the Day of Judgement. It is also written (Kohelet 7:27): "See, this I have found, said Kohelet, one to one to find an account." They explained to me that every decree ordained by the sages is exactly equivalent, 'one to one,' to the core biblical commandment. Why did they make these decrees? 'To find an account,' large and full of merit when coming before the Great King on the Day of Judgement. This is the meaning of 'one to one,' the equivalence of decrees to observing commandments, 'to find an account' of merit. All this they responded to me in truth.

They responded [in my dream]: "You are not wise to ask such a question," (Kohelet 7:10) "for the ways of the Lord are upright, the righteous will walk their paths, and the wicked shall stumble" (Hosea 14:10), "Have I not written it three times?" (Proverbs 22:20) "Incline after the many" (Exodus 23:2) - and the majority today forbid such things. In the Heavenly Yeshiva, there is no dispute on this subject, and we all rule that this is forbidden.

And I have wondered many times if it is even possible that a person in the history of the world has fully fulfilled this verse. Perhaps this idea is included in what King Shlomo said, “There is no righteous person in the world who does only good and no wrong” (Kohelet 7:20) - which means to say that even if his deeds were all good [in the eyes of G-d], it is impossible to not sin in the second way, regarding fulfilling the obligation [to be innocent in the eyes of] people.