“Restlessness is discontent and discontent is the first necessity of progress. Show me a thoroughly satisfied man and I will show you a failure.”— Thomas Edison
“Discontent arises from a knowledge of the possible, as contrasted with the actual.”— Aneurin Bevan
“I was born a thousand years too late... and I don't like the world I'm living in.”— Charles Marion Russell
“Some of us are born with a sense of urgency. We are not comfortable in this world. We are not at home here.”— Daniel Berrigan