And are not words easy and simple?

And it is necessary to learn both the easy and the hard in this subject. It is necessary to understand the subject with the ability to understand the logical difficulty ('easy and hard' means a logical way to draw conclusions from the easy matter about the hard matter. If one acts in a certain way about the easy matter, then one must certainly act in the same way about the hard matter. (He is worse than him.)

("He who learns from his friend a single chapter or a single walk or a single verse or a single word, even one of them, must be treated with respect, as we have seen in David, king of Israel, who did not speak to Ahithophel except two things in his heart - and they called his master his master and his advisor, as it is said (Tehillim 55) And you are a man according to my values, my master. And I know. And there are no easy and difficult things - and what did David king of Israel not learn from Ahithophel but two things in his heart, his master called him his champion and his knower. He who learns from his friend one chapter or one walk or one verse or one word, even one - on one, how much and how much it is necessary to treat him with honor and no honor" - Fathers and C)

Translation