We must make progress slowly so as to preserve the progress we have already made.

... we will hope that future historians will explain the morbid symptoms of present-day society as the childhood ailments of an aspiring humanity, due entirely to the excessive speed at which civilization was advancing.

All progress is based upon a universal innate desire on the part of every organism to live beyond its income.

The reasonable man adapts himself to the world: the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.

The reason the Romans built their great paved highways was because they had such inconvenient footwear.

We are still climbing a steep hill. We are far from the top, but we can see the top in the distance.

By habits of thrift and economy, by way of the industrial school and college, we are coming up. We are crawling up, working up, yea, bursting up-often through oppression, unjust discrimination and prejudice-but through them all we are coming up, and with proper habits, intelligence, and property, there is no power on earth than can permanently stay our progress.

Progress, man's distinctive mark alone, Not God's, and not the beasts': God is, they are, Man partly is and wholly hopes to be.

Is it progress if a cannibal uses a fork?

A thousand things advance; nine hundred and ninety-nine retreat: that is progress.