Have you convinced yourself that filled (packed, crammed, crowded) mean the same as fulfilled (satisfied, content, pleased)? Do you consider staying perpetually busy, living?
“Do what you should do, when you should do it, whether your feel like it or not.” – Thomas Huxley.
Self-discipline is a combination of willpower of persistence. Willpower to resist the temptations offered by self- gratification, and persistence to continue resisting until the goal is achieved.
“He who is not contented with what he has, would not be contented with what he would like to have.” Socrates.
If God looked directly into your eyes and said, “I command that you be happy in the world as long as you live,” what would you do? Why bother to live an unhappy life.