Things flourish, then each returns to its root. Returning to the root is called stillness: Stillness is called return to life, return to life is called the constant; knowing the constant is called enlightenment.
The tree which needs two arms to span its girth sprang from the tiniest shoot. Yon tower, nine stories high, rose from a little mound of earth. A journey of a thousand miles begins with a single step.
Greed for enlightenment and immortality is no different than greed for material wealth. It is self-centered and dualistic, and thus an obstacle to true attainment. Therefore these states are never achieved by those who covet them; rather, they are the reward of the virtuous.