Everything with that equation makes sense to me except for one thing. “Attainable” there are certainly some aspects of life where attainability is an important factor. Namely, anything that requires a large risk in terms of time or resources invested. This is really just a way to mitigate risk. Although, if you are attempting to achieve a gain, adaptation, life changing, radical, destiny altering goal; it’s likely that attainability is a vague and perhaps useless part of the goal framework.
I would submit that some of the greatest achievements in human history have been accomplished by those with no concern for attainability. The problem lies in our lack of self-confidence about the “type” of person that we are. We are willing to let friends, society, peers subjugate us, our abilities, to that of the status quo. Some people have the attitude that because they are lame, mediocre, and afraid to make radical goals; that you should follow suit. If you are one of these people, consider what damage your words to could do to someone with great potential. If these type of people are in your group of friends, consider getting new friends.