Kenneth Boulding

"The only way to survive as a species is to learn to think in terms of systems"

"Love is the only force capable of transforming an enemy into a friend"

"Education is the most powerful weapon which you can use to change the world"

"The future is something which everyone reaches at the rate of 60 minutes an hour, whatever he does"

"Knowledge is power, but wisdom is knowing how to use it"

"Courage is not the absence of fear, but rather the assessment that something else is more important than fear"

"The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time"

"Peace is not merely the absence of war, but the presence of justice"

"What we fear doing most is usually what we most need to do"

"The greatest threat to our planet is the belief that someone else will save it"

"Truth is like a river; it flows downhill to where the world stands"

"Success is not final, failure is not fatal: it is the courage to continue that counts"

"The only true wisdom is in knowing you know nothing"

"Friendship is the hardest thing in the world to explain"

"Change is the only constant in the universe"

"Hope is the thing with feathers that perches in the soul"

"The measure of intelligence is the ability to change"

"Life is what happens when you're busy making other plans"

"In a world without meaning, we must create our own"

"The past cannot be changed. The future is yet in your power"

"What lies behind us and what lies before us are tiny matters compared to what lies within us"

"The greatest glory in living lies not in never falling, but in rising every time we fall"

"The only way out is through"

"Everything you want is on the other side of fear"

"The mind is everything. What you think, you become"

"Do what you feel in your heart to be right, for you'll be criticized anyway"

"Life is either a daring adventure or nothing at all"

"The only impossible journey is the one you never begin"

"Gratitude is the healthiest of all human emotions"

"Art enables us to find ourselves and lose ourselves at the same time"