"Most North Americans know that human-caused global warming is real, even if political leaders don't always reflect or act on that knowledge."

"Hydraulic fracturing requires massive amounts of water. Disposing of the toxic wastewater, as well as accidental spills, can contaminate drinking water and harm human health."

"Thanks to evolution, our bodies have powerful ways to ward off illness and infection and enable us to live long and healthy lives. Why, then, do health costs continue to climb at unsustainable and frightening rates?"

"If we pollute the air, water and soil that keep us alive and well, and destroy the biodiversity that allows natural systems to function, no amount of money will save us."

"The greatest deception is forgetting that the true master is an eternal student."

"Education should prepare our minds to use its own powers of reason and conception rather than filling it with the accumulated misconceptions of the past."

"The silent observer understands that the true master is an eternal student."

"It is a enduring truth that experience is the stern teacher that gives the examination before the lesson — an essential principle for the reflective life."