To be constantly without desire is the way to have a vision of the mystery of heaven and earth. For constantly to have desire is the means by which their limitations are seen.
The transformation toward eternal life is gradual. The heavy gross energy of body, mind, and spirit must first be purified and uplifted. When the energy ascends... then self mastery can be sought.
But in the present day men cast off gentleness, and are all for being bold; they spurn frugality, and retain only extravagance; they discard humility, and aim only at being first. Therefore they shall surely perish.
The great Tao flows everywhere. All things are born from it, yet it doesn't create them. It pours itself into its work, yet it makes no claim. It nourishes infinite worlds, yet it doesn't hold on to them. Since it is merged with all things and hidden in their hearts, it can be called humble. Since all things vanish into it and it alone endures, it can be called great. It isn't aware of its greatness; thus it is truly great.