I want to remember this

From "The Ten Commandments: Laws of the Heart" by Joan Chittister, on the 9th commandment, the law of self-control:

The Buddha taught that "Just as a tree, though cut down, can grow again and again if its roots are undamaged and strong, in the same way if the roots of craving are not wholly uprooted sorrows will come again and again." It isn't what we have that makes us unhappy; it's what we want that leaves us dull to the present, unaware of what we have.