For some natures, changing their opinions is just as much a requirement of cleanliness as changing their clothes: for others, however, it is merely a requirement of vanity.
When old words die out on the tongue, new melodies break forth from the heart; and where the old tracks are lost, new country is revealed with its wonders.
When you get free from certain fixed concepts of the way the world is, you find it is far more subtle, and far more miraculous, than you thought it was.
The theory that can absorb the greatest number of facts, and persist in doing so, generation after generation, through all changes of opinion and detail, is the one that must rule all observation.
In my experience, in the real-estate business past success stories are generally not applicable to new situations. We must continually reinvent ourselves, responding to changing times with innovative new business models.