“It can be said that sustainability has two ethical obligations in time and space—one horizontal and one vertical. The horizontal obligation is to all humans and to all life living in the present: we must live equitably within the boundaries of what the Earth can sustain. The vertical obligation is to extend that process into the future, in other words, a commitment to generations of humans and nonhumans still unborn.”

Question for Meditation: What is your commitment to today? What is your commitment to the future?