“My life is one long obstacle course with me as the chief obstacle.”

“Life is an obstacle course. You succeed at one thing and then you move on to the next. When an obstacle is tough, you try harder. When an obstacle is insurmountable, you change course. But you never sit down and refuse to finish.”

“The chief obstacle to the progress of the human race is the human race. ”

“One of the chief obstacles to intelligence is credulity, and credulity could be enormously diminished by instruction in the prevalent forms of mendacity.”

“For a long time it had seemed to me that life was about to begin -- real life. But there was always some obstacle in the way, something to be gotten through first, some unfinished business, time still to be served, a debt to be paid. Then life would begin. At last it dawned on me that these obstacles were my life.”

“Obstacles cannot crush me; every obstacle yields to stern resolve.”