The best time to plant a tree was 20 years ago. The second b... - Christopher Peterson

"The best time to plant a tree was 20 years ago. The second best time is now."

Christopher Peterson

Psychologist American 1950–2012

More from Christopher Peterson

"Other people matter."

"The good life is not a static state. It is a direction."

"What you do with your life is up to you. Fish for trout, accept it."

"Positive psychology takes seriously the fact that people want more than just to not be miserable."