A good traveler has no fixed plans and is not intent upon arriving. A good artist lets his intuition lead him wherever it wants. A good scientist has freed himself of concepts and keeps his mind open to what is.
No sensible man (among the many things that have been written on this kind) ever imputed inconsistency to another for changing his mind.
[Lat., Nemo doctus unquam (multa autem de hoc genere scripta sunt) mutationem consili inconstantiam dixit esse.]
An orchard, good tillage, good grounds, seem a fixture, like a gold mine, or a river, to a citizen; but to a large farmer, not much more fixed than the state of the crop.
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.
Without books the development of civilization would have been impossible. They are the engines of change, windows on the world, "Lighthouses" as the poet said "erected in the sea of time." They are companions, teachers, magicians, bankers of the treasures of the mind, Books are humanity in print.
The time's come: there's a terrific thunder-cloud advancing upon us, a mighty storm is coming to freshen us up....It's going to blow away all this idleness and indifference, and prejudice against work....I'm going to work, and in twenty-five or thirty years' time every man and woman will be working.