The richest, happiest and most productive lives are characterized by the ability to fully engage in the challenge at hand, but also to disengage periodically and seek renewal
Any form of stress that prompts discomfort has the potential to expand capacity – physically, mentally, emotionally or spiritually – so long as it is followed by adequate recovery
-Loehr and Schwarz
A soothsayer calls out to Caesar as he passes and warns him against the ides of March, March 15. Caesar ignores the man and dismisses him as a dreamer. Upon seeing Cassius, Caesar informs Antony that he would rather be surrounded by men who are fat and happy than thin men like Cassius. He is worried that Cassius is dangerous because he "thinks too much" (1.2.193-196). Antony tells him not to worry about Cassius.
This is fantastic:
If determination is effectively the product of will and discipline, then you can become more determined by being more disciplined... In some very energetic people's lives you see something like wing flutter, where they alternate between doing great work and doing absolutely nothing. Externally this would look a lot like bipolar disorder.
Full piece here.