The only way a man can remain consistent amid changing circumstances is to change with them while preserving the same dominating purpose.

The oldest habit in the world for resisting change is to complain that unless the remedy to the disease should be universally applied it should not be applied at all. But you must start somewhere.

To improve is to change; to be perfect is to change often.

I don't think the human mind can comprehend the past and the future. They are both just illusions that can manipulate you into thinking there's some kind of change.

I'm one of those people that think Thomas Edison and the light bulb changed the world more than Karl Marx ever did.

What I've learned is not to change who you are, because eventually you're going to run out of new things to become.