True progress is slow but sure.

All progression is in the relative world.

Take any path you like; follow any prophet you like; but have only that method which suits your own nature, so that you will be sure to progress.

Discontent is the first necessity of progress.

The things I've done in my life have required a lot of years of work before they took off.

Things do not grow better; they remain as they are. It is we who grow better, by the changes we make in ourselves.