Some have considered mental work the hardest work there is. Let’s consider this line of thought in regards to rigor. If mental rigor, or thinking, is the hardest work alone, what implications would distraction have when we attempt to engage in it? Traditional distraction is already blocked out on autopilot to the point where advertisers spend millions to billions of dollars getting our attention. That’s on the outside alone – when we consider the internal distractions as well, what can we do to make things easier for ourselves? A consensus on this is systems and methods geared to lead us to a desired result when we act upon them.
The mind appears to work on autopilot and follows the principle of least effort in its’ regular function. Given no personal initiative on the personal responsibility of our own mind, can you see how it’s so easy to lose track given this observation of the mind? It’s more important than money, especially since it’s one of the means of creating it in the first place!
Rigor is typically associated with wholeness and demands. A whole demand would consider all aspects. As such, it’s a pretty strong line. This is in line with the etymology of rigor, along with rigidity. With this it’s easy to identify the definite demand that Napoleon Hill talks about.
Strangely enough, intellectual disciplines do not have to be mentally rigorous or difficult. When applying intuition for the pursuit of either, plenty might be revealed to the individual to act upon.