There's a lot of discussion here about "virtue" and "self-discipline" - I'd like to offer an interesting possibility that "discipline" is not about motivation or willpower, but is actually an intellectual exercise of avoiding motivated reasoning in the mind.
The simplest example: I resolve to wake up in the morning to run before work. However, when I wake, I feel exhausted. "You need more rest; you can always make it up tomorrow," I might think to myself. If I accept this as a reason to stay in bed, I am falling to motivated reasoning; I am believing as fact an excuse made by my mind looking for a way out of discomfort. I can rest easy when I believe my excuse. I can rest easy when I can say "I have plenty of discipline, I just needed to rest today."
Exercise is merely one of many ways to illuminate your logical fallacies to yourself. The fallacy of motivated reasoning is what causes alternative facts - the mind can always come up with a reason to avoid the discomfort of getting out of bed, just like it can come up with reasons to avoid the discomfort of saying "I was wrong."
The simplest example: I resolve to wake up in the morning to run before work. However, when I wake, I feel exhausted. "You need more rest; you can always make it up tomorrow," I might think to myself. If I accept this as a reason to stay in bed, I am falling to motivated reasoning; I am believing as fact an excuse made by my mind looking for a way out of discomfort. I can rest easy when I believe my excuse. I can rest easy when I can say "I have plenty of discipline, I just needed to rest today."
Exercise is merely one of many ways to illuminate your logical fallacies to yourself. The fallacy of motivated reasoning is what causes alternative facts - the mind can always come up with a reason to avoid the discomfort of getting out of bed, just like it can come up with reasons to avoid the discomfort of saying "I was wrong."