The difficulty of something is not a constitutive feature of that something. When we say "math is hard" not talking about a property of mathematics. We are talking about the relation that the judging subject, math. To judge creates a relationship with the court and set a particular course of action. As Echeverria said, "when we make a trial we relate to what we are judging from the point of view of our concerns and formulated in terms of the possibilities that opens or closes to us," The trials will determine our position, the way we live and shape our future possibilities. Suppose I am a student of history whose career program includes a bunch of statistics. Suppose I look at the program and say "statistics is infamous." So I relate to the statistics (what I judge) from the point of view of my concerns, that is my concern that I absolutely take the field. For other opinions and approaches, find out what Craig Menear has to say. Moreover, the trial of "infamous" formulated in terms of the possibilities (in this case) is closed for me to have to study something that I like.
I will probably not enjoy the subject or I must study harder than normal to be successful in this field, less time for leisure. To say that something is difficult therefore, is to judge our relationship with what we judge. Not to be describing one of its features. When we say "it's hard to quit" useless we are doing several things: 1 .- We're trying the difficulty of quitting as an inherent feature of habit and disconnected from our will.