It is indeed true that the more a person keeps himself in a zone of challenge and performance, the better he becomes at handling future challenges. I am saying that because I recently sat for a relatively simple exam (AWS SA-Associate Certification) and found it difficult to sit for a long time. This is in contrast to times before when I easily sat for 3+ hours to do a professional or speciality exam. In comparison, I have found it quite easy and natural (not effortless) to work through the preparatory steps for the exams (and other projects) in a methodical way; even when the road is long and the load is heavy.
Until I find a stronger and better supported explanation, I am attributing this development of inner strength to the fact that: for the last 1 year, I have been taking cold showers in the morning (I know, what is the relationship)?
At the onset of this habit, I debated with myself and even tried to find valid reasons to skip or just take a warm shower. Increasingly, I have taught myself to get in the shower, allow the internal debate to continue, but go through the motions necessary without letting the debate hinder the process. Even a slight hesitation is not allowed – I simply put myself in the third person and go ahead with switching the valve to ‘cold’ and then opening the water.
The above approach is documented (I am not going to provide links) as a good way to build inner strength and practice the ability to know what needs to be done and proceed to do it; even when it is unpleasant. “The spirit is willing, but the flesh is weak”. I will talk at depth in other posts, but I will mention that this has been valuable for me when deciding to stay the course or start a daunting and long project – “Just start!”