Progression-Regression

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

All that is human must retrograde if it do not advance. (Gibbon)

Is it progress if a cannibal uses knife and fork ? (Stanislaw Lec)

The desire to understand the world and the desire to reform it are the two great engines of progress, without which human society would stand still or retrogress. (Bertrand Russell)

The fatal metaphor of progress which means leaving things behind us, has utterly obscured the real idea of growth, which means leaving things inside us. (G K Chesterton)